26681

This number is a prime.

The least prime k such that k, k+2, k+6, k+12, k+18, k+20, k+30, (k+2)+30, (k+6)+30, (k+12)+30, (k+18)+30, (k+20)+30 are consecutive primes, i.e., 26681, 26683, 26687, 26693, 26699, 26701, 26711, 26713, 26717, 26723, 26729, 26731 are successive primes. [Ikemoto]