213742domain: NAppears in sequencesLeast k such that k*10^n+1, k*10^n+3, k*10^n+7 and k*10^n+9 are all prime.at n=22A064281Consecutive states of the linear congruential pseudo-random number generator (741*s + 66037) mod 312500 when started at s=1.at n=13A385358