8 951 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
17903	5	14.1	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	8203 / 16550

Estimated T-Level: 47.5 ⓘ

TF below 2^153 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	272FBFBC2DA4D579	1	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	272FBFBC2DA4D579	1	1347	1	3
Verified	2020-04-17	Oliver Kruse	2DA13EC6830283F8	1	7074	5	3
Verified	2022-05-12	Jorge Coveiro	2DA13EC6830283F8	1	3675	5	3

History

Date	User	Type	Result
2023-07-26	JacobZ	NF-PM1	B1=65000000000, B2=251099672798124150
2022-05-12	Jorge Coveiro	C-PRP	M8951/17903 : 2DA13EC6830283F8 PRP: Verified PRP without proof (small exponent)
2021-12-16	Lisander Viaene	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M8951/17903 : 2DA13EC6830283F8 PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M8951/17903 : 272FBFBC2DA4D579 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M8951/17903 : 272FBFBC2DA4D579 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M8951/17903 : 272FBFBC2DA4D579 PRP without proof (not generated)