1 874 177 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
239894657	9	27.8	old
779657633	9	29.5	2008-07-15 07:47:41
4705775280871272212417	22	72.0	2021-03-02 15:51:40

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)	2017-10-04	Oliver Kruse	D7DD2E66A8056345	2	0	1	3
Verified (Factored)	2017-11-07	kkmrkkblmbrbk	D7DD2E66A8056345	2	1754791	1	3
Verified	2021-03-03	Kriesel	5DDCE3C8ABEFFE6D	3	1491542	5	3

History

Date	User	Type	Result
2021-03-03	Ben Delo	CERT	PRP Certification Proof certified good
2021-03-03	Kriesel	C-PRP	M1874177/239894657/779657633/4705775280871272212417 : 5DDCE3C8ABEFFE6D PRP proof power = 7 PRP: Verified Proof certified good
2021-03-02	_p95holder_	F-ECM	Factor: 4705775280871272212417 / (ECM curve 4, B1=50000, B2=5000000)
2017-11-07	kkmrkkblmbrbk	C-PRP	M1874177/239894657/779657633 : D7DD2E66A8056345 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1874177/239894657/779657633 : D7DD2E66A8056345 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: 779657633