2 208 053 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
127840582499833871	18	56.8	old
5251066239417367544255417	25	82.1	2018-01-17 02:27:52

ECM

Digits	B1	Curves
25	50000	89 / 280

Estimated T-Level: 21.6 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-09	Oliver Kruse	AE983B46726F23BD	1	0	1	3
Verified (Factored)	2017-11-20	kkmrkkblmbrbk	AE983B46726F23BD	1	1190598	1	3
Verified	2018-01-21	Oliver Kruse	B01B417A5D195879	2	667838	5	3
Verified	2018-01-22	AdolfNor	B01B417A5D195879	2	307629	5	3
Verified	2018-01-23	Chang Chia-Tche	B01B417A5D195879	2	1576845	5	3

History

Date	User	Type	Result
2021-07-03	Dylan Delgado	NF-PM1	B1=2000000, B2=242000000
2021-06-28	Dylan Delgado	NF-PM1	B1=1000000, B2=106000000
2018-01-23	Chang Chia-Tche	C-PRP	M2208053/127840582499833871/5251066239417367544255417 : B01B417A5D195879 PRP: Verified PRP without proof (not generated)
2018-01-22	AdolfNor	C-PRP	M2208053/127840582499833871/5251066239417367544255417 : B01B417A5D195879 PRP: Verified PRP without proof (not generated)
2018-01-21	Oliver Kruse	C-PRP	M2208053/127840582499833871/5251066239417367544255417 : B01B417A5D195879 PRP: Verified PRP without proof (not generated)
2018-01-17	ATH	F-ECM	Factor: 5251066239417367544255417 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-20	kkmrkkblmbrbk	C-PRP	M2208053/127840582499833871 : AE983B46726F23BD PRP: Verified PRP without proof (not generated)
2017-10-09	Oliver Kruse	C-PRP	M2208053/127840582499833871 : AE983B46726F23BD PRP: Verified PRP without proof (not generated)
2016-04-15	alpertron	NF-PM1	B1=500000, B2=15000000, E=12