4 877 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
384899903860394486820209	24	78.3	old
1488395151278132163882178577	28	90.3	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	11748 / 40830

Estimated T-Level: 51.4 ⓘ

TF below 2^166 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	FEE92E284A2EA8DB	2	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	FEE92E284A2EA8DB	2	0	1	3
Verified	2017-12-07	ATH	FEE92E284A2EA8DB	2	3673	1	3
Verified	2020-04-17	Oliver Kruse	904DB8B8A7171157	2	1725	5	3
Verified	2024-02-03	Wentao Huang	904DB8B8A7171157	2	1507	5	3

History

Date	User	Type	Result
2024-02-03	Wentao Huang	C-PRP	M4877/384899903860394486820209/1488395151278132163882178577 : 904DB8B8A7171157 PRP: Verified PRP without proof (small exponent)
2023-05-30	-Anonymous-	NF-PM1	B1=65000000000, B2=652146174764434350
2021-07-09	ViliamF	NF-PM1	B1=1000000000, B2=201000000000
2020-04-17	Oliver Kruse	C-PRP	M4877/384899903860394486820209/1488395151278132163882178577 : 904DB8B8A7171157 PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M4877/384899903860394486820209/1488395151278132163882178577 : FEE92E284A2EA8DB PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M4877/384899903860394486820209/1488395151278132163882178577 : FEE92E284A2EA8DB PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M4877/known_factors : FEE92E284A2EA8DB PRP without proof (not generated)