Initial (unsafe) primes of Cunningham chains of first type with length exactly 7.

Terms

a(0) =1122659a(1) =2164229a(2) =2329469a(3) =10257809a(4) =10309889a(5) =12314699a(6) =14030309a(7) =14145539a(8) =23103659a(9) =24176129a(10) =28843649a(11) =37088729a(12) =42389519a(13) =49160099a(14) =50785439a(15) =62800169a(16) =68718059a(17) =88174049a(18) =95831189a(19) =105388169a(20) =121255889a(21) =138140729a(22) =155439419a(23) =159938459a(24) =173285999