2 131 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
3273217	7	21.6	old
17359127	8	24.0	old
129239458251829470983931962239	30	96.7	old
75240946321572974052576429054198576888452431	44	145.8	2008-10-16 23:57:24

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	60701 / 105362

Estimated T-Level: 57.9 ⓘ

TF below 2^187 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	0843BAC8F064E70B	4	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	0843BAC8F064E70B	4	0	1	3
Verified	2017-12-07	ATH	0843BAC8F064E70B	4	169	1	3
Verified	2020-04-17	Oliver Kruse	E15C7DEFDFEF7072	4	808	5	3
Verified	2024-01-27	Wentao Huang	E15C7DEFDFEF7072	4	1432	5	3

History

Date	User	Type	Result
2024-04-25	masser	NF-PM1	B1=100000000000, B2=192252280032302490
2024-01-27	Wentao Huang	C-PRP	M2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : E15C7DEFDFEF7072 PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : E15C7DEFDFEF7072 PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : 0843BAC8F064E70B PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M2131/3273217/17359127/129239458251829470983931962239/75240946321572974052576429054198576888452431 : 0843BAC8F064E70B PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M2131/known_factors : 0843BAC8F064E70B PRP without proof (not generated)
2016-09-08	kkmrkkblmbrbk	NF-PM1	B1=500000000, B2=50000000000, E=12
2008-10-16	-Anonymous-	F-ECM	Factor: 75240946321572974052576429054198576888452431