- 4253 is the exponent of the 19th Mersenne Prime. Chapter 42 has 53 verses. 4253 is the 249th Non-Chen Prime. The 195th composite is 249
- 195th prime number is 1187
- 1187th prime is 9619 and sura 96 has 19 verses
- The digits are 249, namely 2, 4, and 9 are the indices of primes 3, 7, and 23
- 3 × 7 × 23 = 483
- 483rd Gaussian prime is 7523 which is the 953rd prime number
- 953rd composite is 1143 = 9 × 127
