2 551 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
39370751359	11	35.2	old
316051526511439	15	48.2	old
2468841389136391	16	51.1	old
784845784608594641	18	59.4	old
445026266963588591477879	24	78.6	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	40830 / 40830
60	260000000	20503 / 105362

Estimated T-Level: 56.0 ⓘ

TF below 2^181 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	22A1FFCBD23C41D3	5	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	22A1FFCBD23C41D3	5	0	1	3
Verified	2017-12-07	ATH	22A1FFCBD23C41D3	5	1769	1	3
Verified	2020-04-17	Oliver Kruse	FD1679C0F9E080AD	5	1141	5	3
Verified	2024-02-03	Wentao Huang	FD1679C0F9E080AD	5	217	5	3

History

Date	User	Type	Result
2024-02-03	Wentao Huang	C-PRP	M2551/39370751359/316051526511439/2468841389136391/784845784608594641/445026266963588591477879 : FD1679C0F9E080AD PRP: Verified PRP without proof (small exponent)
2021-07-05	ViliamF	NF-PM1	B1=1000000000, B2=191000000000
2020-04-17	Oliver Kruse	C-PRP	M2551/39370751359/316051526511439/2468841389136391/784845784608594641/445026266963588591477879 : FD1679C0F9E080AD PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M2551/39370751359/316051526511439/2468841389136391/784845784608594641/445026266963588591477879 : 22A1FFCBD23C41D3 PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M2551/39370751359/316051526511439/2468841389136391/784845784608594641/445026266963588591477879 : 22A1FFCBD23C41D3 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M2551/known_factors : 22A1FFCBD23C41D3 PRP without proof (not generated)