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A082520
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Palindromic Sophie Germain primes: both p and 2p+1 are palindromic primes.
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3
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2, 3, 5, 191, 19391, 38183, 1508051, 1609061, 1628261, 3717173, 3916193, 161535161, 161838161, 170646071, 172747271, 182949281, 190909091, 352909253, 354848453, 360818063, 364636463, 15052625051, 15150805151, 15253635251
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OFFSET
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1,1
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COMMENTS
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REFERENCES
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H. Dubner, "Palindromic Sophie Germain primes", Journal of Recreational Mathematics, Vol. 26(1):38-41 1994 Baywood Inc. NY
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LINKS
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EXAMPLE
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3916193 is in the sequence because both 3916193 and 2*3916193 + 1 = 7832387 are palindromic primes.
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MATHEMATICA
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Select[Prime@Range@1000000, PalindromeQ@#&&PalindromeQ[2#+1]&&PrimeQ[2#+1]&] (* Giorgos Kalogeropoulos, May 14 2021 *)
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CROSSREFS
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The associated primes are listed in A082565.
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KEYWORD
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base,nonn
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AUTHOR
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STATUS
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approved
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