is 2 4695221 - 1
has 1413403 decimal digits
takes 0.618 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6D200D37AE019B39double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273407.402468.4932 %420000010880984400113.938510.4866 %521.340971.7971 %
Target2651.553964.6154 %3000030000000.03662.2323 %1.590565.4053 %
Difference+8+405.8486+3.8778 %+4170000+10877984400+113.9019+8.2543%+519.7505+6.3919 %

Known prime factors:
No known factors for M4695221

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-09-03Carsten Kossendeymother25000387500--0.0091.900%
2013-09-23Squeeky_SquirrelT7500_220016500040425006--0.0724.699%
2013-09-29David Campeaui5-2500k9400003008000012--0.4838.147%
2023-03-08Sid & AndyMagic_8_Ball420000010880984400--132.517.786%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2002-09-14David Campeauv4_computers212610.033
2010-06-30markrut2612620.065
2011-12-11GrunwalderGIMPManual testing212630.340
2016-02-23Mark RoseManual testing2622630.209
2015-02-22JayderManual testing2632640.418
2015-02-22monstManual testing2642650.796
2015-07-10snme2pm1Manual testing2652661.592
2018-04-20BloodERazorManual testing2662673.183
2018-10-09YxinityManual testing2672686.366
2021-03-21ANONYMOUSManual testing26827189.13
2021-03-24ANONYMOUSManual testing271273305.6


ECM factoring results:
Total ECM effort:1.578 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.578


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-06-01ANONYMOUSv4_computers6D200D37AE019B390.618
2000-01-25ANONYMOUSv4_computers6D200D37AE019B390.618


PRP results:
No PRP results for M4695221


CERT results:
No CERT results for M4695221


P-1 factor-bounds graph:
B1 = 4200000, B2 = 10880984400 (P-1 stage 2)
B1 = 4200000 (P-1 stage 1)
B1 = 940000, B2 = 30080000 (P-1 stage 2)
B1 = 940000 (P-1 stage 1)
B1 = 165000, B2 = 4042500 (P-1 stage 2)
B1 = 165000 (P-1 stage 1)
B1 = 25000, B2 = 387500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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1011
TF factor-bounds graph:
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261
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=1.73 ~= -11-bit
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Last modified: 2024-03-13T02:15:48+00:00