2 143 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 5 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
19076561690287	14	44.1	old
21641364655753	14	44.3	old
5583850438566365729	19	62.3	old
930646424669932445491603781582624009541297445271	48	159.3	2019-10-09 17:05:41
64623331336198898594440039453194648416125825865919822348751	59	195.4	2020-09-03 00:49:16

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	60992 / 105362

Estimated T-Level: 57.9 ⓘ

TF below 2^187 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	7008042C8A6BD859	3	0	1	3
Factored	No proof (small exponent)	2017-10-02	kkmrkkblmbrbk	7008042C8A6BD859	3	0	1	3
Factored	No proof (small exponent)	2017-12-07	ATH	7008042C8A6BD859	3	1173	1	3
Factored	No proof (small exponent)	2019-10-10	Niels_Mache_Nextcloud	13B6F28F26DFD7A6	4	1823	5	3
Factored	No proof (small exponent)	2019-10-11	kkmrkkblmbrbk	13B6F28F26DFD7A6	4	1665	5	3
Factored	No proof (small exponent)	2020-04-17	Oliver Kruse	13B6F28F26DFD7A6	4	96	5	3
Verified	No proof (small exponent)	2020-09-03	jvang	13B6F28F26DFD7A6	5	177	5	3
Verified	No proof (small exponent)	2020-09-04	atrench	13B6F28F26DFD7A6	5	1176	5	3

History

Date	User	Type	Result
2025-04-01	masser	NF-PP1	Start=153/71, B1=5300000000, B2=5294700000000
2024-04-28	masser	NF-PM1	B1=100000000000, B2=280718410237164900
2020-09-04	atrench	C-PRP	M2143/19076561690287/21641364655753/5583850438566365729/930646424669932445491603781582624009541297445271/64623331336198898594440039453194648416125825865919822348751 : 13B6F28F26DFD7A6
2020-09-03	jvang	C-PRP	M2143/19076561690287/21641364655753/5583850438566365729/930646424669932445491603781582624009541297445271/64623331336198898594440039453194648416125825865919822348751 : 13B6F28F26DFD7A6
2020-09-03	Ryan Propper	F-ECM	Factor: 64623331336198898594440039453194648416125825865919822348751
2020-04-17	Oliver Kruse	C-PRP	M2143/19076561690287/21641364655753/5583850438566365729/930646424669932445491603781582624009541297445271 : 13B6F28F26DFD7A6
2019-10-11	kkmrkkblmbrbk	C-PRP	M2143/19076561690287/21641364655753/5583850438566365729/930646424669932445491603781582624009541297445271 : 13B6F28F26DFD7A6
2019-10-10	Niels_Mache_Nextcloud	C-PRP	M2143/19076561690287/21641364655753/5583850438566365729/930646424669932445491603781582624009541297445271 : 13B6F28F26DFD7A6
2019-10-09	Ryan Propper	F-ECM	Factor: 930646424669932445491603781582624009541297445271
2017-12-07	ATH	C-PRP	M2143/19076561690287/21641364655753/5583850438566365729 : 7008042C8A6BD859
2017-10-02	kkmrkkblmbrbk	C-PRP	M2143/19076561690287/21641364655753/5583850438566365729 : 7008042C8A6BD859
2017-09-21	Oliver Kruse	C-PRP	M2143/known_factors : 7008042C8A6BD859
2016-09-08	kkmrkkblmbrbk	NF-PM1	B1=500000000, B2=50000000000, E=12
2009-10-25	Carsten Kossendey	F	Factor: 5583850438566365729
1999-05-02	-anonymous-	F-PM1	Factor: 19076561690287
1999-03-26	-anonymous-	F-PM1	Factor: 19076561690287
1999-03-15	-anonymous-	F-PM1	Factor: 19076561690287