Around 30 years ago an Egyptian American man named Rashad Khalifa, PhD, found a Hidden secret within the structure of the Quran. This Hidden secret was in a form of mathematics which presents proof of the authenticity of the Quran.

The Quran has 114 chapters and 29 of these chapters after the opening statement of 'In the name of God, the all Compassionate, the all Merciful" starts with sets of letters or Initials. No one knew the meaning or propose of these Initials. These initials consists of one to five letters, such as, A.L.M.; A.L.R.; Q.; S.; K.H.Y.A.S. ; N. and etc.... The table below shows the Quranic Initials.

Please notice in Table above that there are 29 chapters of the Quran which are preceded by sets of Arabic letters. Some of the sets are repeated more that one time. For example ALM is used six (6) times, preceding chapters 2, 3, 29, 30, 31, and 32. There are 14 individual sets. The computer data showed that the total number of initials repeated in each chapter are all divisable by number 19.

In chapter 74 'Hidden Secret' (oR lØÎC ) God says :

(74:30)

"Over it is nineteen"

(74:31)
We appointed angles to be guardians of Hell, and we assigned their number to disturb the disbelievers. Convince the ones who have been given scriptures. Strengthen the Belief of the believers. Remove all traces of doubt from the hearts of those who have been given scriptures, as well as the believers. And to expose those who harbor doubt in their hearts, and the disbelievers; they will say, "What did GOD mean by this allegory?" GOD thus sends astray whomever He wills, and guides whomever He wills. None knows the soldiers of your Lord except He. This is a reminder for the people.

(74:32)
Absolutely, by the moon.

(74:33)
And the night as it passes.

(74:34)
And the morning as it shines.

(74:35)
This is one of the great miracles.

In Chapter 74, Hidden Secret, God simlpy is telling us what the SECRET is :

"The whole Quran is mathematically composed by nubmber '19'"

The books of Quranic exegeses unanimously agreed that "no one knows the meaning or significance of the Quranic Initials A.L.M. (.Ö .Í .C) , or any other initials." Dr. Khalifa decided to write the Quran into the computer, analyze the whole text, and see if there were any mathematical correlation among these Quranic initials. He used a time-share terminal, connected by telephone to a giant computer. To test his hypothesis, he fed the whole Quran in to the computer, then he counted the number of each initials in initial chapters. With in four years little by little the mathemathical code of the Quran was revealed to him.
In Chapter 27, Verse 82, we read:

"At the right time, we will produce for them a creature, made of earthly materials, declaring that the people are not certain about our revelations."

The computer is the "creature", it is made of metal, silicone, plastic, all are earthly materials. And with the use of computer the mathematical structure of the Quran was discovered. 2+7+8+2=19

Dr. Khalifa in his Quran translation "Quran The Final Testament", says:

"The Quran is characterized by a unique phenomenon never found in any human authored book. Every element of the Quran is mathematically composed, the chapters, the verses, the words, the number of certain letters, the number of words from the same root, the number and variety of divine names, the unique spelling of certain words, the absence or deliberate alteration of certain letters within certain words, and many other elements of the Quran besides its content. There are two major facets of the Quran's mathematical structure system : (1) The mathematical literary composition, and (2) The mathematical structure involving the numbers of chapters and verses. Because of this comprehensive mathematical coding, the slightest distortion of the Quran's text or physical arrangement is immediately exposed."

Nineteen (19) is the key to the mathematical structure as evidenced in the following paragraphs. As you see this is not numerology, God says that the Quran is on Base number 19. You just have to count the number of letters.
It does not take a genius to figure this out, anybody could have found that out, but God decided that for 1400 years this mathematical formula stays hidden and, He reserved it for a specific person, in a specific time, and for specific generations.

A.L.M. (Alef. Laam. Mim.) (.Ö .Í .C) (ÙÎC)
A. (D@ C)
L. (Í Ð@ @Ï@ @Î)
M. (Ö Ù@ @Ø@ @×)

The letters "Alef," (C) "Laam," (Í) and "Mim" (Ö ) are the most frequently used letters in the Arabic language, and in the same order as we see in the Quranic Initials - "Alef," (C) then "Laam," (Í) then "Mim" (Ö ).These. letters prefix six chapters- 2, 3, 29, 30, 31, and 32 and the total occurrence of the three letters in each of the six chapters is a multiple of 19, 9899 (19x521), 5662 (19x298), 1672 (19x88), 1254 (19x66), 817 (19x43), and 570 (19x30), respectively. Thus, the total occurrence of the three letters in the six chapters is 19874 (19x1046), and the alteration of one of these letters destroys this phenomenon.
Another relevant example is the reference to Mecca (éÇ×) in 3:96 as "Becca"! (éÇF) This strange spelling of the renowned city has puzzled Islamic scholars for many centuries. Although Mecca is mentioned in the Quran properly spelled in 48:24, the letter "Mim" (Ö) is substituted with a "Ba" (@F) in 3:96. It turns out that chapter 3 is an M-initialed chapter, and the count of the letter (M.) "Mim" (@×) would have deviated from the Quran's code if "Mecca" (éÇ×) was spelled correctly in 3:96.

The grammatical value of the word "Waahed" (ldCÞ) meaning "One" is one of the names that God attributes for himself. To find the grammatical value of this word simply we refer to an above chart and find each letter with its assigned value, and this is what we come up with :
(wow) (Þ) (6) + (alif) (C) (1) + (Haa) (c) (7) + (Dhal) (k) (4) = 19

The Quran is described in Chapter "Q" (Á) as "Majid" (lìW×) (glorious), and the Arabic word "Majid" has a Grammatical value of 57. You may check with an above chart again:
k D (4) + ê Y (10) + U J (3) + Ö M (40) = 57 = 19 X 3

The first statement in the Quran "In The Name of God, The all Compassionate, The all Merciful" (Bisme Allah A'rrahmaan A'rraheem) ÙìdpÎC ÝØdpÎC éÏÎC ÙwF consists of 19 Arabic letters. Also the frequencies of occurrence of these four words in the whole Quran is devisable by the number 19.
"'Bisme"' (In the name of) (ÙwF) 19 times.
"Allah" (God) (éÏÎC) 2698 times. 19X142.
"A'rrahmaan" (The All Compassionate) (ÝØdpÎC) 57 times. 19X3.
"A'rraheem" (The All Merciful) (ÙìdpÎC) 114 times. 19X6.

It seems that the number 19 is God's signature on His creations. In general the lenght of pregnancy for full term fetus is 266 days (19X14) or 38 weeks (19X2) after fertilization. See Langman's Medical Embryology by T.W. Sadler.

Now If we give English alphabets value, as A=1, B=2, C=3, etc, the total value of D.N.A. equals 19. D=4 , N=14, A=1 (4+1+14=19) Praise be to God, the Almighty!

Haley's comet visit the earth every 76 years (19x4). From the time of Muhammad until revelation of the Quran's mathematical code, Haley's comet has visited the earth 19 times.

The cell responsible for distributing protein throughout human body is called 'Messenger', and it has a tail consisting of 19 parts.

The total number of bones in human body is 209 or (19x11).

The sun, the moon, and the earth become aligned in the same relative position once every 19 years.

This mathematical miracle was revealed to us in during the 1900's.

There should be many other examples that still are hidden to us but, at the right time by the will of God, they will be revealed to us.