is 2 1788601 - 1
has 538423 decimal digits
takes 0.097 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L091620D7436CE8F7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26833.324969.1176 %200000003400953055501,459.051019.8952 %1,492.375975.2617 %
Target2610.171765.5738 %80006500000.00341.4931 %0.175166.0878 %
Difference+7+33.1531+3.5439 %+19992000+340094655550+1,459.0476+18.4020%+1,492.2007+9.1739 %

Known prime factors:
No known factors for M1788601

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-02-08Carsten Kossendeymother9500016387506--0.0144.873%
2014-04-10ANONYMOUSManual testing100000100000--0.0082.028%
2014-05-09JossManual testing135885135885--0.0112.338%
2014-09-19JossManual testing171770171770--0.0142.591%
2015-06-13mikrMSI24754008666000012--0.55612.689%
2018-07-02JossManual testing178860117886010012--0.90013.664%
2018-10-19JossManual testing178860119674611012--0.97613.819%
2023-01-07JossManual testing1788601917476560--4.92716.280%
2023-02-27JossManual testing17886012662542960--13.9917.939%
2023-05-17JossManual testing17886016274350810--32.7519.247%
2023-08-13linamentU2K2000000020000000--1.57310.273%
2023-08-14linamentCyber20000000340095305550--1,45928.416%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-04masserManual testing16000005760000011671--0.427


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-25ANONYMOUSv4_computers212580.021
2010-04-21Architects Cubedm1_76l2602610.086
2010-10-27GrunwalderGIMPManual testing212630.892
2016-02-23Mark RoseManual testing2582630.785
2015-05-15snme2pm1Manual testing2632653.187
2015-09-12ramgeisManual testing2652664.178
2017-10-27TJAOIManual testing2662678.356
2019-06-24TJAOIManual testing26726816.71


ECM factoring results:
Total ECM effort:36.121 GHz-days
Estimated T-Level:25.662
DigitsB1CompleteFacMiss
201100014.7310.000%
25500001.61819.832%
302500000.13287.596%
3510000000.00999.122%


ECM Summary

B1B2factorcurvesGHz-days
50000500000027919.07
250000400000004017.06


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13ANONYMOUSv4_computers091620D7436CE8F70.097
2015-07-18MadPooManual testing091620D7436CE8F70.097


PRP results:
No PRP results for M1788601


CERT results:
No CERT results for M1788601


P-1 factor-bounds graph:
B1 = 20000000, B2 = 340095305550 (P-1 stage 2)
B1 = 1788601, B2 = 6274350810 (P-1 stage 2)
B1 = 1788601, B2 = 2662542960 (P-1 stage 2)
B1 = 1788601, B2 = 917476560 (P-1 stage 2)
B1 = 20000000 (P-1 stage 1)
B1 = 1788601, B2 = 196746110 (P-1 stage 2)
B1 = 1788601, B2 = 178860100 (P-1 stage 2)
B1 = 2475400, B2 = 86660000 (P-1 stage 2)
B1 = 2475400 (P-1 stage 1)
B1 = 1788601 (P-1 stage 1)
B1 = 95000, B2 = 1638750 (P-1 stage 2)
B1 = 171770 (P-1 stage 1)
B1 = 135885 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
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TF factor-bounds graph:
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258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00