9 883 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 7 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
158129	6	17.3	old
10436449	8	23.3	old
21258273703	11	34.3	old
1753018713541977529	19	60.6	old
740958100482716677361	21	69.3	old
52777604336327421559117167977173663	35	115.3	old
450826387535591546789201943375206602903	39	128.4	2018-06-24 09:14:39

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	9147 / 16550

Estimated T-Level: 47.8 ⓘ

TF below 2^154 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2017-09-21	Oliver Kruse	7BCCA155FC7EDA58	6	0	1	3
Factored	No proof (small exponent)	2017-10-02	kkmrkkblmbrbk	7BCCA155FC7EDA58	6	0	1	3
Factored	No proof (small exponent)	2017-12-07	ATH	7BCCA155FC7EDA58	6	458	1	3
Verified	No proof (small exponent)	2018-06-24	axn	78D2D95A7F0F6F76	7	8733	5	3
Verified	No proof (small exponent)	2018-06-24	francijezek	78D2D95A7F0F6F76	7	471	5	3
Verified	No proof (small exponent)	2018-06-24	francijezek	78D2D95A7F0F6F76	7	6158	5	3
Verified	No proof (small exponent)	2018-06-25	arnaud	78D2D95A7F0F6F76	7	5016	5	3

History

Date	User	Type	Result
2025-07-07	Kevin_9611	NF-PM1	B1=120000000000, B2=12021396323666730
2025-06-25	Kevin_9611	NF-PM1	B1=100000000000, B2=1015892638190430
2025-06-25	Kevin_9611	NF-PM1	B1=100000000000
2025-03-20	masser	NF-PP1	Start=181/61, B1=1000000000, B2=999000000000
2023-06-12	JacobZ	NF-PM1	B1=58000000000, B2=241250667952694400
2022-11-25	Kevin_9611	NF-PM1	B1=1000000000, B2=100294988083290
2021-08-27	Seth_Tr	NF-PM1	B1=400000000
2018-06-25	arnaud	C-PRP	M9883/158129/10436449/21258273703/1753018713541977529/740958100482716677361/52777604336327421559117167977173663/450826387535591546789201943375206602903 : 78D2D95A7F0F6F76
2018-06-24	francijezek	C-PRP	M9883/158129/10436449/21258273703/1753018713541977529/740958100482716677361/52777604336327421559117167977173663/450826387535591546789201943375206602903 : 78D2D95A7F0F6F76
2018-06-24	francijezek	C-PRP	M9883/158129/10436449/21258273703/1753018713541977529/740958100482716677361/52777604336327421559117167977173663/450826387535591546789201943375206602903 : 78D2D95A7F0F6F76
2018-06-24	axn	C-PRP	M9883/158129/10436449/21258273703/1753018713541977529/740958100482716677361/52777604336327421559117167977173663/450826387535591546789201943375206602903 : 78D2D95A7F0F6F76
2018-06-24	Hexaflexagon	F-ECM	Factor: 450826387535591546789201943375206602903
2017-12-07	ATH	C-PRP	M9883/158129/10436449/21258273703/1753018713541977529/740958100482716677361/52777604336327421559117167977173663 : 7BCCA155FC7EDA58
2017-10-02	kkmrkkblmbrbk	C-PRP	M9883/158129/10436449/21258273703/1753018713541977529/740958100482716677361/52777604336327421559117167977173663 : 7BCCA155FC7EDA58
2017-09-21	Oliver Kruse	C-PRP	M9883/known_factors : 7BCCA155FC7EDA58