7 873 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
1180951	7	20.2	old
1200160121	10	30.2	old
99962587251231955979753667848833	32	106.3	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	6059 / 9201

Estimated T-Level: 43.3 ⓘ

TF below 2^139 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	2C2CBFC151043709	3	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	2C2CBFC151043709	3	0	1	3
Verified	2017-12-07	ATH	2C2CBFC151043709	3	7334	1	3
Verified	2020-04-17	Oliver Kruse	12C94DF4F0C39F0B	3	2986	5	3
Verified	2024-02-03	Wentao Huang	12C94DF4F0C39F0B	3	1219	5	3

History

Date	User	Type	Result
2024-02-03	Wentao Huang	C-PRP	M7873/1180951/1200160121/99962587251231955979753667848833 : 12C94DF4F0C39F0B PRP: Verified PRP without proof (small exponent)
2021-07-10	ViliamF	NF-PM1	B1=1000000000, B2=201000000000
2020-04-17	Oliver Kruse	C-PRP	M7873/1180951/1200160121/99962587251231955979753667848833 : 12C94DF4F0C39F0B PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M7873/1180951/1200160121/99962587251231955979753667848833 : 2C2CBFC151043709 PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M7873/1180951/1200160121/99962587251231955979753667848833 : 2C2CBFC151043709 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M7873/known_factors : 2C2CBFC151043709 PRP without proof (not generated)