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A030473
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Primes which are concatenations of 4 consecutive primes.
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7
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2357, 67717379, 838997101, 139149151157, 149151157163, 383389397401, 503509521523, 557563569571, 577587593599, 587593599601, 601607613617, 613617619631, 727733739743, 937941947953, 1181118711931201
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OFFSET
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1,1
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LINKS
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MAPLE
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P:= select(isprime, [2, seq(p, p=3..10^4, 2)]):
select(isprime, [seq(P[i+3]+10^(1+ilog10(P[i+3]))*P[i+2] + 10^(2+ilog10(P[i+3])+ilog10(P[i+2]))*P[i+1] + 10^(3+ilog10(P[i+3])+ilog10(P[i+2])+ilog10(P[i+1]))*P[i], i=1..nops(P)-3)]); # Robert Israel, Apr 14 2016
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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