login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A164905 Primes from composite numbers by prefixing with 1. 0

%I

%S 19,127,139,149,151,157,163,181,191,193,199,1117,1123,1129,1153,1171,

%T 1187,1201,1213,1217,1231,1237,1249,1259,1279,1289,1291,1297,1301,

%U 1303,1319,1321,1327,1361,1381,1399,1423,1427,1429,1447,1451,1453,1459,1471

%N Primes from composite numbers by prefixing with 1.

%C The composite numbers are considered in increasing order.

%H Dario Alpern, <a href="http://www.alpertron.com.ar/ECM.HTM">Factorization using the Elliptic Curve Method</a>

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

%Y Cf. A002808

%K base,nonn

%O 1,1

%A _Parthasarathy Nambi_, Aug 30 2009

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 28 04:02 EDT 2022. Contains 354112 sequences. (Running on oeis4.)