k is Sierpinski number base b if....
Code:
k b
1 (none)
2 (no such b < 201446503145165177)
3 (no such b < 158503)
4 == 14 mod 15
5 == 11 mod 12
6 == 34 mod 35
7 == 5 mod 24 or == 11 mod 12
8 == 20 mod 21 or == 47, 83 mod 195 or == 467 mod 73815 or == 722 mod 1551615
9 == 19 mod 20
10 == 32 mod 33
11 == 5 mod 24 or == 14 mod 15 or == 19 mod 20
12 == 142 mod 143 or == 296, 901 mod 19019 or 562, 828, 900, 1166 mod 1729 or == 563 mod 250705 or == 597, 1143 mod 1885
13 == 20 mod 21 or == 27 mod 28 or == 132, 293 mod 595
14 == 38 mod 39 or == 64 mod 65
15 == 13 mod 14 but not == 1 mod 16
16 == 38, 47, 98, 242 mod 255 or == 50 mod 51 or == 84 mod 85
17 == 11 mod 12 or == 278, 302 mod 435 or == 283, 355, 367, 607, 907 mod 1638 or == 373, 445, 646, 718 mod 819
18 == 322 mod 323 or == 398, 512 mod 1235
19 == 11 mod 12 or == 14 mod 15 or == 29 mod 40
20 == 56 mod 57 or == 132 mod 133
21 == 43 mod 44 or == 54 mod 55
22 == 68 mod 69 or == 160 mod 161
23 (== 21 mod 22 but not == 1 mod 8) or == 32 mod 33 or == 41 mod 48 or == 83 mod 530 or == 182 mod 795
24 == 114 mod 115
25 == 38 mod 39 or == 51 mod 52