- The Exponent of the 19th Mersenne Prime is 4253.
- The Exponent of the 19th Gaussian Mersenne Prime is 353.
- The 353rd Regular Prime is 4253.
- Surah 42 has 53 verses and 353 is the frequency of م + ح (Hha + Meem) in Surah 42!
- 4253 is 249th Non-Chen Prime.
- 249 is 195th Composite.
- 195 is the 19th Sphenic Number.
- 195 is the numerical value of ص + ع + ي + ه + ك (Kaf + Ha + Ya + Ain + Sad) in Sura 19.
- 249 = 3 × 83.
- 3 is the 2nd Prime and 83 is the 23rd Prime.
- 223 is the 19th Lonely Prime.
- 223rd Composite is 285.
- 285 is the frequency of Initials يس (YaSeen) is Surah 36.
- Note, Surah 36 called يس (YaSeen) is the 19th Initialed Surah is the Quran.
- 383rd Composite is 475.
- 475th Revealed Verse in the initialed Surahs is 19:1 which is كهيعص (Kaf + Ha + Ya + Ain + Sad).
- The 249th Lonely Gaussian Prime is 5683 which is the 748th Prime.
- The 748th Lonely Prime is 9127.
