A164905 Primes from composite numbers by prefixing with 1.

19, 127, 139, 149, 151, 157, 163, 181, 191, 193, 199, 1117, 1123, 1129, 1153, 1171, 1187, 1201, 1213, 1217, 1231, 1237, 1249, 1259, 1279, 1289, 1291, 1297, 1301, 1303, 1319, 1321, 1327, 1361, 1381, 1399, 1423, 1427, 1429, 1447, 1451, 1453, 1459, 1471

Offset

1,1

Comments

The composite numbers are considered in increasing order.

Links

Table of n, a(n) for n=1..44.

Dario Alpern, Factorization using the Elliptic Curve Method

Example

1493 is a prime from the composite number 493 by prefixing it with 1.

Crossrefs

Cf. A002808

Sequence in context: A241965 A182193 A109669 * A142106 A078851 A202125

Adjacent sequences: A164902 A164903 A164904 * A164906 A164907 A164908

Keyword

base,nonn

Author

Parthasarathy Nambi, Aug 30 2009

Status

approved