is 2 77321789 - 1
has 23276178 decimal digits
takes 218.004 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L9013FDFC682F53__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27598.961964.0000%670000128975005.46263.7049%104.424565.3338%1.3338%
PrimeNet2703.090361.4286%340000160000004.87805.7526%7.968463.6474%2.2189%
GPU7227449.479863.5135%500000180000005.94204.1987%55.421865.0455%1.5319%
Difference+1+49.4821+0.4865%+170000-5102500-0.4794-0.4938%+49.0027+0.2883%+0.2883%

Known prime factors:
No known factors for M77321789

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-13T19:18:28Scott Bennetthellas67000012897500---5.463--3.705%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-08-17T00:00:00ANONYMOUSv4_computers21253--1.55186e-5--
2003-12-02T00:00:00ANONYMOUSv4_computers21261--0.004--
2016-04-03T13:00:12Mark RoseManual testing261264--0.042--
2010-09-30T16:24:00GrunwalderGIMPcompute-0-3264265--0.048--
2010-10-02T08:15:00AlsXZXZhome265266--0.097--
2010-10-02T22:39:00lindedDBP51NG1266267--0.193--
2010-10-03T09:57:00Gimarelhom267268--0.387--
2010-10-12T05:07:00arnaudSRV-140268269--0.773--
2011-01-15T08:08:00Kevin JagetLaptop269270--1.546--
2012-12-31T23:46:00Charles A. Morrischandra270271--3.093--
2015-06-11T00:45:00ChuckManual testing271272--6.185--
2015-11-04T22:29:34RichD0Manual testing272273--12.37--
2016-02-17T16:25:13AirSquirrelsManual testing273274--24.74--
2016-02-17T18:05:13AirSquirrelsManual testing274275--49.48--


ECM factoring results:
No ECM results for M77321789


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2018-01-02T13:32:08-Anonymous-9013FDFC682F53__218.0


PRP results:
No PRP results for M77321789


P-1 factor-bounds graph:
B1 = 670000, B2 = 12897500 (P-1 stage 2)
B1 = 670000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2018-01-02T13:32:08+00:00