[#21656] Prime numbers as input not detected

Date:
2018-03-09 20:36

Priority:
3

State:
Open

Submitted by:
Ken Takusagawa (kenta)

Assigned to:
Nobody (None)

Category:
none

Group:
none

Resolution:
none

Summary:
Prime numbers as input not detected

Detailed description
If a large prime is given as input to ecm, it is not rejected or warned; it futilely proceeds trying to factor it: echo 2^521-1 \| ecm -c 0 -I 1 1e5 It would be nice to have a feature to check for primality at the beginning.
If a large prime is given as input to ecm, it is not rejected or warned; it futilely proceeds trying to factor it: echo 2^521-1 \| ecm -c 0 -I 1 1e5 It would be nice to have a feature to check for primality at the beginning.

Message
Date: 2018-03-09 21:11 Sender: Paul Zimmermann please see option -primetest

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