A046475 Primes that are palindromic in bases 6 and 10.

2, 3, 5, 7, 191, 108151801, 11271517211, 155259838952551

Offset: 1

Author

Patrick De Geest, Aug 15 1998

Keywords

• nonn
• hard
• base

Comments

(The only primes that are palindromic in bases 5 and 10 that have been found are the trivial solutions 2 and 3.)

Examples

			191_10 = 515_6. - _Jon E. Schoenfield_, Apr 10 2021
		

Links

• P. De Geest, World!Of Palindromic Primes

Crossrefs

Cf. A002385, A029963.

Programs

Mathematica

pal6Q[p_]:=With[{idn6=IntegerDigits[p,6]},PalindromeQ[p]&&idn6==Reverse[idn6]]; Select[Prime[Range[63*10^5]],pal6Q] (* The program generates the first six terms of the sequence. *) (* Harvey P. Dale, Dec 04 2024 *)