is 2 6220651 - 1
has 1872603 decimal digits
takes 1.102 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 L-L tests remaining
ResidueStatus
L-LBC894E88FF4515D7double-checked
PRPA04D999F96F1318F

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272153.735368.0556%30000002430000004.13117.1250%157.866470.3316%2.2760%
PrimeNet2620.098862.9032%260006000000.01473.3494%0.113564.1457%1.2425%
GPU722662.374165.1515%400009000000.02232.4316%2.396465.9989%0.8474%
Difference+6+151.3612+2.9040%+2960000+242100000+4.1087+4.6933%+155.4699+4.3327%+4.3327%

Known prime factors (1 factor, 96.6 bits, 0.00155238% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
62206511174659336840610902302987076313096.5689441610989272753786565
3 × 5 × 7 × 41 × 97 × 1091 × 450811 × 45970789
2021-10-06450811459707894.984e+90.75321.2021

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-12-07T00:00:00ANONYMOUSv4_computers30000240000---0.011--0.663%
2013-04-11T04:51:00Squeeky_SquirrelP4_26001150002300000---0.060--1.835%
2019-09-29T06:45:01takahashivaio6000001200000012---0.314--3.534%
2021-10-06T15:09:51firejugglerMaison30000002430000003096.5684.1312.2058.2627.125%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-11T00:00:00ANONYMOUSv4_computers?261--0.025--
1998-07-21T00:00:00ANONYMOUSv4_computers?261--0.025--
1998-07-21T00:00:00ANONYMOUSv4_computers?262--0.049--
2016-02-23T16:39:20Mark RoseManual testing262263--0.158--
2014-09-12T09:14:00NesowaManual testing263264--0.316--
2014-09-17T00:05:00monstManual testing264265--0.601--
2015-10-12T20:55:04snme2pm1Manual testing265266--1.201--
2016-03-19T20:41:01Gordon SpenceManual testing266267--2.403--
2018-06-01T13:51:59ramgeisManual testing267268--4.805--
2020-04-02T23:16:21takahashiManual testing268269--9.61--
2020-11-22T00:58:31takahashiManual testing269270--19.22--
2021-08-21T15:38:41SRBaseManual testing270271--38.44--
2021-09-19T18:16:49SRBaseManual testing271272--76.88--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.617 GHz-days
Estimated T-Level:0.300
DigitsB1CurvesCompleteFacMiss
20110006 / 1000.06094.148%
25500006 / 2800.02197.876%

New Calculation Method

Total ECM effort:1.617 GHz-days
Estimated T-Level:0.300
DigitsB1CompleteFacMiss
20110000.19482.403%
25500000.01798.266%
302500000.00199.892%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.617


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00Stephen Woodv4_computersBC894E88FF4515D71.102
2001-01-14T00:00:00ANONYMOUSv4_computersBC894E88FF4515D71.102


PRP results:
dateuseridcompidcofactorsres64PRP
2021-10-06T17:44:05firejugglerMaison
117465933684061090230298707631
A04D999F96F1318Fno


P-1 factor-bounds graph:
B1 = 3000000, B2 = 243000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 600000, B2 = 12000000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 115000, B2 = 2300000 (P-1 stage 2)
B1 = 115000 (P-1 stage 1)
B1 = 30000, B2 = 240000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
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TF factor-bounds graph:
272
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270
269
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2100
Last modified: 2021-10-06T17:44:05+00:00