is 2 79221617 - 1
has 23848084 decimal digits
takes 247.210 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-LDFEF2848A4C7D8__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27596.588664.0000%670000135675006.21103.7545%102.799765.3516%1.3516%
PrimeNet2716.034761.9718%340000160000005.39895.2406%11.433663.9647%1.9929%
GPU7227596.588664.0000%500000170000006.32993.7782%102.918565.3601%1.3601%
Difference---+170000-3432500-0.1189-0.0237%-0.1189-0.0085%-0.0085%

Known prime factors:
No known factors for M79221617

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-09-12T17:40:54FilenSirrah46700001356750012---6.211--3.755%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-30T00:00:00ANONYMOUSv4_computers21253--1.51464e-5--
2001-05-06T00:00:00Jocelyn Larouchev4_computers21260--0.002--
2004-09-02T00:00:00ANONYMOUSv4_computers21263--0.020--
2016-04-05T13:02:24Mark RoseManual testing263264--0.025--
2016-04-05T13:00:58Mark RoseManual testing264265--0.047--
2010-11-16T10:52:00S00030vd01265266--0.094--
2010-11-21T20:02:00BisisVIA_C7-D_1_8GHz266267--0.189--
2010-11-25T08:07:00Fred Cirera267268--0.377--
2010-11-28T12:11:00Sid & AndyMrs_Potato_Head268269--0.755--
2010-12-03T16:44:00Sid & AndyMrs_Potato_Head269270--1.509--
2013-01-23T18:23:00phoenicisManual testing270271--3.018--
2016-02-19T08:33:54GregManual testing271272--6.037--
2016-07-22T06:42:10cuBerBruceManual testing272273--12.07--
2016-08-23T16:37:18A_SavchenkoManual testing273274--24.15--
2016-08-23T16:37:18A_SavchenkoManual testing274275--48.30--


ECM factoring results:
No ECM results for M79221617


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2018-04-26T07:34:01Dax Mickelsonskunk2DFEF2848A4C7D8__247.2


PRP results:
No PRP results for M79221617


P-1 factor-bounds graph:
B1 = 670000, B2 = 13567500 (P-1 stage 2)
B1 = 670000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2018-04-26T07:34:01+00:00