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A118849
Digital clock primes such that the number of minutes past midnight is also prime.
11
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 101, 107, 113, 137, 149, 211, 229, 311, 313, 317, 331, 347, 349, 353, 359, 401, 431, 443, 547, 607, 613, 619, 641, 659, 701, 719, 743, 811, 823, 829, 907, 929, 937, 947, 953, 1013, 1019, 1031, 1117
OFFSET
1,1
COMMENTS
The number of minutes past midnight represented by each of the times here can be found in A118850.
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 1..83 (full sequence)
FORMULA
a(n) = A118850(n) + floor(A118850(n)/60)*40.
MAPLE
for h from 0 to 23 do for m from 0 to 59 do t:=100*h+m: if(isprime(60*h+m) and isprime(t))then printf("%d, ", t): fi: od: od: # Nathaniel Johnston, May 17 2011
CROSSREFS
KEYWORD
nonn,base,easy,fini,full
AUTHOR
Carl R. White, May 01 2006
STATUS
approved