2 048 243 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
42749247252502567951	20	65.2	old
1291601544495782300366767	25	80.1	2021-07-21 10:26:51

ECM

Digits	B1	Curves
25	50000	123 / 280

Estimated T-Level: 22.2 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)	1999-01-17	J.F. Wickey	ACA932C6EB7D4065	599264
Verified (Factored)	1999-03-01	David Phillips	ACA932C6EB7D4065	1600886

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-06	Oliver Kruse	D9E1090071E27091	1	0	1	3
Verified (Factored)	2017-11-15	kkmrkkblmbrbk	D9E1090071E27091	1	99425	1	3
Verified	2021-07-21	SRJ2877	1F88B06E1CE9D7BD	2	1770869	5	3
Verified	2021-07-21	tanaydin	1F88B06E1CE9D7BD	2	76149	5	3

History

Date	User	Type	Result
2021-07-21	Gene Marlin	CERT	PRP Certification Proof certified good
2021-07-21	tanaydin	C-PRP	M2048243/42749247252502567951/1291601544495782300366767 : 1F88B06E1CE9D7BD PRP proof power = 7 PRP: Verified Proof certified good
2021-07-21	Tom Kayser	CERT	PRP Certification Proof certified good
2021-07-21	SRJ2877	C-PRP	M2048243/42749247252502567951/1291601544495782300366767 : 1F88B06E1CE9D7BD PRP proof power = 7 PRP: Verified Proof certified good
2021-07-21	seatsea	F-ECM	Factor: 1291601544495782300366767 / (ECM curve 3, B1=50000, B2=6750000, Sigma=631078216957396)
2017-11-15	kkmrkkblmbrbk	C-PRP	M2048243/42749247252502567951 : D9E1090071E27091 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-06	Oliver Kruse	C-PRP	M2048243/42749247252502567951 : D9E1090071E27091 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12