7 121 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 3 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
2410950176567	13	41.1	old
4492202993001512175608993	25	81.9	old
981699625212423826313904772778259971143	39	129.5	2021-03-09 00:52:15

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	2716 / 9201

Estimated T-Level: 41.5 ⓘ

TF below 2^133 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-21	Oliver Kruse	5E7DA6C330317D01	2	0	1	3
Verified (Factored)	2017-10-12	kkmrkkblmbrbk	5E7DA6C330317D01	2	3617	1	3
Verified (Factored)	2020-04-17	Oliver Kruse	0E86AF00E6EC0CEB	2	3045	5	3
Verified	2021-03-09	mikr	0E86AF00E6EC0CEB	3	4267	5	3
Verified	2021-03-09	MarkS	0E86AF00E6EC0CEB	3	7112	5	3

History

Date	User	Type	Result
2023-08-24	-Anonymous-	NF-PM1	B1=34000000000, B2=142096338314180250
2021-12-16	Lisander Viaene	NF-PM1	B1=100000000
2021-03-09	MarkS	C-PRP	M7121/2410950176567/4492202993001512175608993/981699625212423826313904772778259971143 : 0E86AF00E6EC0CEB PRP: Verified PRP without proof (small exponent)
2021-03-09	mikr	C-PRP	M7121/2410950176567/4492202993001512175608993/981699625212423826313904772778259971143 : 0E86AF00E6EC0CEB PRP: Verified PRP without proof (small exponent)
2021-03-09	Bruno Victal	F-ECM	Factor: 981699625212423826313904772778259971143 / (ECM curve 1062, B1=11000000, sigma=1739537118798489)
2020-04-17	Oliver Kruse	C-PRP	M7121/2410950176567/4492202993001512175608993 : 0E86AF00E6EC0CEB PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M7121/2410950176567/4492202993001512175608993 : 5E7DA6C330317D01 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M7121/2410950176567/4492202993001512175608993 : 5E7DA6C330317D01 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M7121/2410950176567/4492202993001512175608993 : 5E7DA6C330317D01 PRP without proof (not generated)