Smallest primes starting a complete four iterations Cunningham chain of the first or second kind.

Terms

a(0) =2a(1) =1531a(2) =6841a(3) =15391a(4) =44371a(5) =53639a(6) =53849a(7) =57991a(8) =61409a(9) =66749a(10) =83431a(11) =105871a(12) =143609a(13) =145021a(14) =150151a(15) =167729a(16) =186149a(17) =199621a(18) =206369a(19) =209431a(20) =212851a(21) =231241a(22) =242551a(23) =268049a(24) =291271a(25) =296099a(26) =319681a(27) =340919a(28) =346141a(29) =377491