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A213305
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Minimal prime with n nonprime substrings (Version 1: substrings with leading zeros are considered to be nonprime).
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2
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2, 13, 11, 127, 103, 101, 1013, 1019, 1021, 1009, 10177, 10037, 10067, 10007, 10009, 100237, 100271, 100153, 100043, 100003, 100049, 1001173, 1000313, 1000037, 1000033, 1000039, 1000003, 1000081, 10000379, 10001237, 10000223
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OFFSET
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0,1
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LINKS
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FORMULA
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a(n) > 10^floor((sqrt(8*n+1)-1)/2) for n>0.
a(m(m+1)/2) > 10^m, m>0.
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EXAMPLE
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a(0) = 2, since 2 is the least prime with zero nonprime substrings.
a(1) = 13, since 13 is the least prime with exactly 1 (“1”) nonprime substrings.
a(2) = 11, since 11 is the least prime with exactly 2 (“1” and “1”) nonprime substrings.
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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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STATUS
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approved
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