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A133187 Prime numbers of the form q*10^(floor(log(p))+1)+p, where p < q are primes also. 0
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 20 22:22 EDT 2019. Contains 322310 sequences. (Running on oeis4.)