8 297 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
611341564522218772847646009912456500753	39	128.8	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	5575 / 16550

Estimated T-Level: 46.7 ⓘ

TF below 2^150 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-25	Oliver Kruse	4F7EC4D82321F241	1	0	1	3
Verified	2017-09-25	George Woltman	4F7EC4D82321F241	1	6851	1	3
Verified	2017-09-27	Oliver Kruse	4F7EC4D82321F241	1	0	1	3
Unverified	2020-04-17	Oliver Kruse	FCDD1BF73544F6__	1	1645	5	3

History

Date	User	Type	Result
2023-08-30	JacobZ	NF-PM1	B1=71000000000, B2=265422648792401100
2021-12-16	Lisander Viaene	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M8297/611341564522218772847646009912456500753 : FCDD1BF73544F6__ PRP without proof (small exponent)
2017-09-27	Oliver Kruse	C-PRP	M8297/611341564522218772847646009912456500753 : 4F7EC4D82321F241 PRP without proof (not generated)
2017-09-25	George Woltman	C-PRP	M8297/611341564522218772847646009912456500753 : 4F7EC4D82321F241 PRP without proof (not generated)
2017-09-25	Oliver Kruse	C-PRP	M8297/611341564522218772847646009912456500753 : 4F7EC4D82321F241 PRP without proof (not generated)