is 2 2194679 - 1
has 660665 decimal digits
takes 0.144 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LC567D387159DC2FAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual271217.835269.0141 %500000150000000.12303.4933 %217.958270.0965 %
Target2620.279964.5161 %110008000000.00511.5708 %0.285165.0735 %
Difference+9+217.5553+4.4980 %+489000+14200000+0.1178+1.9225%+217.6731+5.0230 %

Known prime factors (1 factor, 72.3 bits, 0.00329625% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
219467959864040572971687759372272.3421363845021822592
27 × 1201 × 5099 × 1739911
2012-12-1650991739911457.640.00950.0169

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-03-16ANONYMOUSv4_computers204820480012--0.0010.779%
2010-11-05JossManual testing1500015000--0.0010.579%
2010-11-09JossManual testing3000030000--0.0030.937%
2011-01-11markrtiny9000016200006--0.0174.443%
2012-12-16Squeeky_SquirrelT7500_22002272.3420.0380.000%
2016-04-04alpertronManual testing5000001500000012
skipped known factor: 5986404057297168775937
---8.269%


Trial Factoring results:
575859606162636465666768697071
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-01-29ANONYMOUSv4_computers212580.017
2022-03-09LordJuliusManual testing21260
2009-01-03Sturle Sundegicy.ifi2602610.070
2009-01-08Sturle Sundeagrell.ifi2612620.140
2012-07-15dbaughManual testing2622641.342
2012-07-18dbaughManual testing2642665.107
2012-07-23dbaughManual testing26626820.43
2012-08-02dbaughManual testing26826927.24
2012-08-15dbaughManual testing26927054.48
2012-09-29dbaughManual testing270271109.0


ECM factoring results:
Total ECM effort:14.443 GHz-days
Estimated T-Level:21.804
DigitsB1CompleteFacMiss
20110003.7922.256%
25500000.36169.705%
302500000.02397.710%
3510000000.00199.890%


ECM Summary

B1B2factorcurvesGHz-days
500005000000262.086
50000665362070.681
50000251271905011.68


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-26ANONYMOUSv4_computersC9404ED866E2BC290.144
1999-05-16PHeedev4_computersC567D387159DC2FA0.144


PRP results:
dateuseridcompidcofactorsres64
2017-10-09Oliver KruseGTX-3
5986404057297168775937
F80C6C9B6227173F
2017-11-19kkmrkkblmbrbkc4.xlarge
5986404057297168775937
F80C6C9B6227173F


CERT results:
No CERT results for M2194679


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 90000, B2 = 1620000 (P-1 stage 2)
B1 = 90000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
TF factor-bounds graph:
271
270
269
268
266
264
262
261
260
258
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=21.8 ~= 56-bit
250
260
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280
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Last modified: 2024-03-13T02:15:48+00:00