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A036341
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Concatenation of prime p and nextprime(p) is prime -> cycles of 4 steps possible.
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4
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127787377, 1510818931, 3147482977, 3307903909, 3621408103, 3964636549, 7224979183, 7881628361, 8043354509, 8740618759, 10091655397, 10164789521, 10194261067, 10380609119, 10436432219, 11472028801, 12059694769, 13887362681, 14880879703, 15197340049
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OFFSET
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1,1
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COMMENTS
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a(1)-a(5) found by Jo Yeong Uk (hyukjo(AT)sigma.chungnam.ac.kr).
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LINKS
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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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Offset corrected and terms a(6) and beyond added by Giovanni Resta, May 14 2020
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STATUS
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approved
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