A247948 Five-digit odd semiprimes with all digits distinct.

10237, 10239, 10249, 10265, 10279, 10297, 10327, 10345, 10347, 10349, 10367, 10379, 10389, 10397, 10423, 10435, 10473, 10483, 10489, 10493, 10495, 10497, 10523, 10537, 10543, 10547, 10573, 10579, 10583, 10587, 10623, 10637, 10643, 10645, 10649

Offset: 1

Author

K. D. Bajpai, Sep 27 2014

Keywords

• nonn
• base
• fini
• full

Comments

There are exactly 4858 five-digit odd semiprimes with all digits distinct. The last few terms of the sequence are: 98501, 98503, 98517, 98521, 98531, 98537, 98567, 98603, 98607, 98617, 98635, 98647, 98653, 98657, 98671, 98701, 98723, 98741, 98743, 98751, 98765.

See the link with the b-file for all 4858 entries.

Examples

			a(1) = 10237 = 29 * 353 is the smallest five-digit odd semiprime with all digits distinct.
a(4858) = 98765 = 5 * 19753 is the largest five-digit odd semiprime with all digits distinct.
		

Links

• K. D. Bajpai, Table of n, a(n) for n = 1..4858

Crossrefs

Cf. A001358, A046315, A074671, A074673, A235690, A247947.

Programs

Mathematica

c = 0; Do[If[Length[Union[IntegerDigits[n]]] == 5 && PrimeOmega[n] == 2, c++; Print[c, "  ", n]], {n, 10001, 99999, 2}]