A227892 Smaller of two consecutive palindromic primes whose product of digits is equal and nonzero.

191, 1129211, 3218123, 7129217, 7718177, 125292521, 146181641, 171292171, 197292791, 198292891, 316141613, 325383523, 359292953, 767292767, 773181377, 777494777, 929292929, 946141649, 983181389, 992181299, 11222922211, 11584948511, 11942924911, 11991819911

Offset: 1

Author

Shyam Sunder Gupta, Oct 14 2013

Keywords

• nonn
• base

Examples

			191 is in the sequence because 191 and 313 are consecutive palindromic primes and the product of the digits of each = 9.
		

Links

• Shyam Sunder Gupta, Table of n, a(n) for n = 1..5000

Crossrefs

Cf. A230083, A007954, A053666, A230228, A230200.

Programs

Mathematica

Select[Partition[Select[Prime[Range[542*10^6]],PalindromeQ],2,1],Times @@ IntegerDigits[ #[[1]]] ==Times@@IntegerDigits[#[[2]]]>0&][[All,1]] (* Harvey P. Dale, Dec 23 2022 *)