A074901 Increasingly larger bases required for composite numbers to become prime by base reversal (A075243).

0, 2, 4, 6, 8, 9, 12, 26, 27, 34, 38, 48, 54, 60, 96, 150, 168, 180, 420, 438, 462, 468, 522, 540, 570, 828, 1320, 1782, 2130, 2142, 2280, 2370, 2448, 2700, 2760, 2790, 2808, 2922, 2952, 2982, 3012, 3402, 3570, 3582, 3972, 4218, 4860, 5148

Offset: 1

Author

Robert G. Wilson v, Sep 16 2002

Keywords

• nonn
• base
• hard
• more

Crossrefs

Cf. A075243.

Extensions

More terms from Amiram Eldar, Jun 04 2021