Primes of the form 4*k-1 such that 8*k-1, 16*k-1, 32*k-1 and 64*k-1 are also primes.

Terms

a(0) =179a(1) =53639a(2) =63419a(3) =126839a(4) =127139a(5) =254279a(6) =296099a(7) =340919a(8) =607319a(9) =810539a(10) =1069199a(11) =1122659a(12) =1598699a(13) =1621619a(14) =1820999a(15) =1866239a(16) =1912679a(17) =1920959a(18) =2045339a(19) =2138399a(20) =2157899a(21) =2245319a(22) =2278079a(23) =2357219a(24) =2667779a(25) =2865839