- The 19th Quadruple primes are derived from the 19th TwinTPCs (19422, 19428).
- There four primes obtained from these two numbers,namely, (19421, 19423, 19427, 19429).
- The only prime in the above list having a digital sum of 19 is 19423.
- The pair 19423 and 19427 are called Cousin Primes and theirindex is 341.
- 341 = 11 × 31.
- 1131st Prime is 9127!
