is 2 1222643 - 1
has 368053 decimal digits
takes 0.037 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LC0F58C112455C225double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26724.303068.6567 %1205000349450000.13536.1915 %24.438370.5973 %
Target2600.125665.0000 %50001500000.00060.8293 %0.126265.2903 %
Difference+7+24.1774+3.6567 %+1200000+34795000+0.1347+5.3622%+24.3121+5.3071 %

Known prime factors (1 factor, 72.2 bits, 0.00590530% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
122264354275526240680215772872272.2012219598289962001
13 × 19 × 1735507 × 5177869
2015-06-0717355075177869782.190.08550.1571

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-09-14Jossv4_computers10001000--4.45000e-50.039%
2002-12-09Mr. P-1v4_computers2000039000012--0.0022.816%
2013-10-07David CampeauManual testing12050003494500012--0.14011.214%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-10ANONYMOUSv4_computers212570.016
2003-05-19ANONYMOUSv4_computers212580.031
2022-03-07LordJuliusManual testing258260
2009-02-14Sturle Sundegorilla.ifi2602610.126
2012-09-13AxelssonManual testing2612620.251
2012-10-18dbaughManual testing2622630.803
2015-03-31omylistManual testing2632641.606
2015-04-06monstManual testing2642653.056


ECM factoring results:
Total ECM effort:19.001 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000027810.48
50000500000030.115
25000025000000448.408


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-08-10ANONYMOUSv4_computersC0F58C112455C2250.037


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-0
5427552624068021577287
2C5EDD0B874E10CE
2017-10-19kkmrkkblmbrbkc4.xlarge
5427552624068021577287
2C5EDD0B874E10CE


CERT results:
No CERT results for M1222643


P-1 factor-bounds graph:
B1 = 1205000, B2 = 34945000 (P-1 stage 2)
B1 = 1205000 (P-1 stage 1)
B1 = 20000, B2 = 390000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 1000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
TF factor-bounds graph:
265
264
263
262
261
260
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
250
260
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280
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Last modified: 2024-02-09T03:30:02+00:00