A133187 Prime numbers of the form q*10^(floor(log(p))+1)+p, where p < q are primes also.

53, 73, 113, 137, 173, 193, 197, 233, 293, 313, 317, 373, 433, 593, 613, 617, 673, 677, 733, 797, 977, 1013, 1033, 1093, 1097, 1277

Offset

1,1

Comments

These numbers are called Caesar primes because the birth date of Julius Caesar (July 13th) provides one example of such a number, i.e. p=7 and q=13 give the prime 13*10+7=137.

Links

Table of n, a(n) for n=1..26.

Crossrefs

Sequence in context: A045807 A007644 A136073 * A057667 A160041 A013538

Adjacent sequences: A133184 A133185 A133186 * A133188 A133189 A133190

Keyword

nonn

Author

Tom Mueller (muel4503(AT)uni-trier.de), Dec 17 2007

Status

approved