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A227409 Prime numbers representing a date in "condensed American notation" MMDDYY. 3
10103, 10111, 10133, 10139, 10141, 10151, 10159, 10163, 10169, 10177, 10181, 10193, 10211, 10223, 10243, 10247, 10253, 10259, 10267, 10271, 10273, 10289, 10301, 10303, 10313, 10321, 10331, 10333, 10337, 10343, 10357, 10369, 10391, 10399, 10427, 10429, 10433 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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.

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

LINKS

Shyam Sunder Gupta, Table of n, a(n) for n = 1..3379

EXAMPLE

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

MATHEMATICA

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]

CROSSREFS

Cf. A227407, A213184.

Sequence in context: A144863 A300558 A227407 * A260247 A058042 A191244

Adjacent sequences:  A227406 A227407 A227408 * A227410 A227411 A227412

KEYWORD

nonn,base,fini,full,less

AUTHOR

Shyam Sunder Gupta, Sep 22 2013

STATUS

approved

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Last modified October 18 12:18 EDT 2019. Contains 328160 sequences. (Running on oeis4.)