1 289 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 5 known prime factors. Cofactor is PRP (Probable-Prime).

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
15856636079	11	33.9	old
108817410937	12	36.7	old
827446666316953	15	49.6	old
9580889333063599	16	53.1	old
16055826953448199975207	23	73.8	old

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_	5	445	1	3
Factored	No proof (small exponent)	2017-12-07	ATH	PRP_PRP_PRP_PRP_	5	493	1	3

History

Date	User	Type	Result
2017-12-07	ATH	P-PRP	M1289/15856636079/108817410937/827446666316953/9580889333063599/16055826953448199975207 PRP Cofactor
2017-11-16	kkmrkkblmbrbk	P-PRP	M1289/15856636079/108817410937/827446666316953/9580889333063599/16055826953448199975207 PRP Cofactor
2009-03-05	-anonymous-	F-ECM	Factor: 16055826953448199975207
2009-03-05	-anonymous-	F-PM1	Factor: 9580889333063599
2009-03-05	-anonymous-	F	Factor: 827446666316953
2009-03-05	-anonymous-	F	Factor: 108817410937