42 648 253 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite: 1 known prime factor

Trial Factored to 2⁷³

TF target 2⁷²

Factored

Factor	Digits	Bits	Date
5533663611886450535353	22	72.2	2018-09-07 23:18:16

Status	Date	User	Residue	Shift	Software
Bad	2009-05-24	raymondf	F10678D3F15563AD	6019340	Linux 64-bit,Prime95,v25.7,build 3
Factored	2015-12-03	ATH	237F93A77865ADE8	29320196	Windows 64-bit,Prime95,v28.7,build 1
Factored	2016-09-27	MadPoo 🙂	237F93A77865ADE8	41920419	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2025-06-16	Greg	F	Factor: 5533663611886450535353 / TF: 72-73
2018-09-07	LaurV	F	Factor: 5533663611886450535353 / TF: 72-73*
2016-09-27	MadPoo 🙂	C-LL	237F93A77865ADE8
2015-12-03	ATH	C-LL	237F93A77865ADE8
2015-07-30	Sid & Andy	NF	no factor TF: 71-72
2015-04-05	Mark Rose	NF	no factor TF: 70-71
2014-04-06	Grant McCracken	NF	no factor TF: 69-70
2014-01-03	LaurV	NF	no factor TF: 68-69
2009-05-24	raymondf	C-LL	F10678D3F15563AD
2009-03-13	raymondf	NF-PM1	B1=715000
2007-10-17	-anonymous-	NF	no factor TF: 1-68