1 321 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite, with 4 known prime factors. Cofactor is PRP (Probable-Prime).

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
7927	4	13.0	old
1394977	7	20.4	old
4848071	7	22.2	old
15514776584693313272539134504494867053743089873	47	153.4	2011-02-01 04:44:32

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2017-11-16	kkmrkkblmbrbk	PRP_PRP_PRP_PRP_	4	47	1	3

History

Date	User	Type	Result
2017-11-16	kkmrkkblmbrbk	P-PRP	M1321/7927/1394977/4848071/15514776584693313272539134504494867053743089873 PRP Cofactor
2011-02-01	Matthias Wurtinger	F-ECM	Factor: 15514776584693313272539134504494867053743089873
2009-10-25	Carsten Kossendey	F	Factor: 53609885144562209

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