is 2 79221559 - 1
has 23848066 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-LE4A70AD3E7C3A8__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27596.588764.0000%690000138000006.35393.7809%102.942665.3611%1.3611%
PrimeNet2716.034761.9718%340000160000005.39895.2406%11.433663.9647%1.9929%
GPU7227596.588764.0000%500000170000006.32993.7782%102.918665.3601%1.3601%
Difference---+190000-3200000+0.0240+0.0027%+0.0240+0.0010%+0.0010%

Known prime factors:
No known factors for M79221559

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-10-01T07:12:03Adam Buran790000790000---3.575--1.683%
2017-03-17T01:41:17Architects Cubedpfs690000138000006---6.354--3.781%


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--
2016-04-05T13:00:58Mark RoseManual testing263264--0.025--
2016-04-04T03:57:36Mark RoseManual testing264265--0.047--
2010-11-15T14:34:00jendajenda265266--0.094--
2010-11-18T12:05:00mk42C61344B7A266267--0.189--
2011-03-19T07:09:00ANONYMOUS_home-office267268--0.377--
2012-04-05T01:24:00ANONYMOUS268269--0.755--
2012-04-12T03:04:00ITSTV269270--1.509--
2013-01-23T18:23:00phoenicisManual testing270271--3.018--
2016-02-19T08:33:53GregManual testing271272--6.037--
2016-07-20T08:26:55cuBerBruceManual testing272273--12.07--
2016-07-24T12:16:14Brian BeuningManual testing273274--24.15--
2016-07-25T17:01:02Mark RoseManual testing274275--48.30--


ECM factoring results:
No ECM results for M79221559


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2018-04-25T21:10:40Jouni MakkonensurkkiE4A70AD3E7C3A8__247.2


PRP results:
No PRP results for M79221559


P-1 factor-bounds graph:
B1 = 690000, B2 = 13800000 (P-1 stage 2)
B1 = 790000 (P-1 stage 1)
B1 = 690000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2018-04-25T21:10:40+00:00