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A227409 Prime numbers representing a date in "condensed American notation" MMDDYY. 3

%I

%S 10103,10111,10133,10139,10141,10151,10159,10163,10169,10177,10181,

%T 10193,10211,10223,10243,10247,10253,10259,10267,10271,10273,10289,

%U 10301,10303,10313,10321,10331,10333,10337,10343,10357,10369,10391,10399,10427,10429,10433

%N Prime numbers representing a date in "condensed American notation" MMDDYY.

%C For February, the number of days will be 28 only, as the year cannot be a leap year if MMDDYY is to be a prime number.

%C The sequence is finite, with 3379 terms. The largest term is a(3379)=123191.

%H Shyam Sunder Gupta, <a href="/A227409/b227409.txt">Table of n, a(n) for n = 1..3379</a>

%e a(1)=10103 is prime and represents a date in MMDDYY format as 010103.

%t t = {}; Do[If[m < 8, If[OddQ[m], b = 31, If[m == 2, b = 28, b = 30]],If[OddQ[m], b = 30, b = 31]]; Do[a = 100 d + y + 10000 m;If[PrimeQ[a], AppendTo[t, a]], {d, 1, b}], {m, 1, 12}, {y, 1, 99}]; Union[t]

%Y Cf. A227407, A213184.

%K nonn,base,fini,full,less

%O 1,1

%A _Shyam Sunder Gupta_, Sep 22 2013

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Last modified November 14 19:55 EST 2019. Contains 329128 sequences. (Running on oeis4.)