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Search: id:A136142
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| A136142 |
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Four consecutive primes with two sets of twin primes. |
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+0
1
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| 5, 7, 11, 13, 11, 13, 17, 19, 101, 103, 107, 109, 137, 139, 149, 151, 179, 181, 191, 193, 191, 193, 197, 199, 419, 421, 431, 433, 809, 811, 821, 823, 821, 823, 827, 829, 1019, 1021, 1031, 1033, 1049, 1051, 1061, 1063, 1481, 1483, 1487, 1489, 1871, 1873
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Some of these are prime quadruples, but some are not. Call them unrestricted prime quadruples.
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LINKS
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Eric Weisstein's World of Mathematics, Prime Quadruplet
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PROGRAM
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(PARI) {forprime(p1=0, 3000, p2=p1+2; if(!isprime(p2), next; ); forprime(p3=p2+1, 6000, p4=p3+2; if(isprime(p4), print1(p1, ", ", p2, ", ", p3, ", ", p4, ", ")); break; ))}
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CROSSREFS
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Cf. A007530.
Adjacent sequences: A136139 A136140 A136141 this_sequence A136143 A136144 A136145
Sequence in context: A122278 A124109 A095798 this_sequence A136162 A140554 A054500
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KEYWORD
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nonn
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AUTHOR
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Harry J. Smith (hjsmithh(AT)sbcglobal.net), Dec 16 2007
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