1 952 663 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
3905327	7	21.9	old
643997908213602201929	21	69.1	2021-02-22 02:28:41

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	52C520ED25D75CF8	1	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	52C520ED25D75CF8	1	1245431	1	3
Verified	2021-02-23	LaurV	E6902D81501B05B9	2	1488645	5	3

History

Date	User	Type	Result
2021-02-23	arnaud	CERT	PRP Certification Proof certified good
2021-02-23	LaurV	C-PRP	M1952663/3905327/643997908213602201929 : E6902D81501B05B9 PRP proof power = 7 PRP: Verified Proof certified good
2021-02-22	Kublenz	F-ECM	Factor: 643997908213602201929 / (ECM curve 2, B1=50000, B2=5000000, Sigma=655023566595293)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1952663/3905327 : 52C520ED25D75CF8 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1952663/3905327 : 52C520ED25D75CF8 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12