A159911 Prime times: primes of the form HMM with primes H, MM, 0

211, 223, 229, 241, 307, 311, 313, 317, 331, 337, 347, 353, 359, 503, 523, 541, 547, 719, 743, 1103, 1117, 1123, 1129, 1153, 1303, 1307, 1319, 1723, 1741, 1747, 1753, 1759, 1907, 1913, 1931, 2311, 2341, 2347

Offset: 1

Author

M. F. Hasler, May 01 2009

Keywords

• base
• dumb
• easy
• fini
• full
• nonn

Comments

Suggested by E. Angelini, cf. link.

Links

• E. Angelini, in "Les membres de ce groupe forment un nombre premier", April 30, 2009.

Crossrefs

See also A050246 and A229106, where H and MM (and SS) do not need to be prime.

Programs

Mathematica

Select[Flatten[Table[FromDigits[Join[IntegerDigits[h],PadLeft[ IntegerDigits[ m],2]]],{h,Prime[Range[9]]},{m,Prime[Range[ 17]]}]],PrimeQ] (* Harvey P. Dale, Mar 27 2022 *)

PARI

forprime( h=0,24, forprime( m=0,60, isprime(100*h+m) & print1(100*h+m,", ")))