- The 19th Mersenne prime has 1281 digits.
- The factors of 1281 are,
- 1281 = 3 × 7 × 61
- The indices of these prime factors are 2, 4, 18.
- 2418th Gaussian Prime is 46511
- The index of the Lonely Prime 46511 is 3491
- 3491 is the number of verses in the Un-initialed suras in the Quran.
- 46511 together with 46507 are the 341st Twin Gaussian Prime pair.
- 341 = 11 × 31
- 1131 is the index of Prime number 9127.
