2 055 953 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
1378997579503	13	40.3	old
1468012120591	13	40.4	2008-07-15 07:49:49
3552616881599	13	41.7	2008-07-15 07:49:49
823492768653518874276595529	27	89.4	2021-07-29 14:08:49

ECM

Digits	B1	Curves
25	50000	135 / 280

Estimated T-Level: 22.4 ⓘ

TF below 2^69 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-06	Oliver Kruse	51D74F3170D1DB6E	1	0	1	3
Verified (Factored)	2017-10-17	Oliver Kruse	391F6722EF6BCCCE	3	239414	5	3
Verified (Factored)	2017-11-15	kkmrkkblmbrbk	391F6722EF6BCCCE	3	106026	5	3
Verified	2021-07-29	SRJ2877	391F6722EF6BCCCE	4	1313860	5	3

History

Date	User	Type	Result
2021-07-29	Simon Josefsson	CERT	PRP Certification Proof certified good
2021-07-29	SRJ2877	C-PRP	M2055953/1378997579503/1468012120591/3552616881599/823492768653518874276595529 : 391F6722EF6BCCCE PRP proof power = 7 PRP: Verified Proof certified good
2021-07-29	_p95holder_	F-ECM	Factor: 823492768653518874276595529 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-15	kkmrkkblmbrbk	C-PRP	M2055953/1378997579503/1468012120591/3552616881599 : 391F6722EF6BCCCE PRP: Verified (Factored) PRP without proof (not generated)
2017-10-17	Oliver Kruse	C-PRP	M2055953/1378997579503/1468012120591/3552616881599 : 391F6722EF6BCCCE PRP: Verified (Factored) PRP without proof (not generated)
2017-10-06	Oliver Kruse	C-PRP	M2055953/1378997579503/1468012120591/3552616881599 : 51D74F3170D1DB6E PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-07-15	J Feitsma	F	Factor: 3552616881599
2008-07-15	J Feitsma	F	Factor: 1468012120591