Smallest prime factor of 1 + (product of first n primes).

Terms

a(0) =3a(1) =7a(2) =31a(3) =211a(4) =2311a(5) =59a(6) =19a(7) =347a(8) =317a(9) =331a(10) =200560490131a(11) =181a(12) =61a(13) =167a(14) =953a(15) =73a(16) =277a(17) =223a(18) =54730729297a(19) =1063a(20) =2521a(21) =22093a(22) =265739a(23) =131a(24) =2336993a(25) =960703a(26) =2297a(27) =149a(28) =334507a(29) =5122427