is 2 4768607 - 1
has 1435494 decimal digits
takes 0.628 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L809217AFCB40CA19double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual271100.255367.6056%16500041662500.07312.4572%100.328568.4016%0.7960%
PrimeNet2610.064462.2951%200004500000.00833.2211%0.072763.5096%1.2145%
GPU722651.529964.6154%300006500000.01222.2841%1.542165.4236%0.8082%
Difference+6+98.7254+2.9902%+135000+3516250+0.0609+0.1731%+98.7863+2.9780%+2.9780%

Known prime factors:
No known factors for M4768607

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-09-05T05:17:00Carsten Kossendeydurandal30000412500---0.010--0.869%
2013-10-01T03:48:00Squeeky_SquirrelT7500_22001650004166250---0.073--2.457%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:38:59Mark RoseManual testing21261--0.064--
2010-05-25T20:49:00markrManual testing261262--0.064--
2011-11-05T16:22:00GrunwalderGIMPManual testing21263--0.335--
2016-02-23T16:38:59Mark RoseManual testing262263--0.206--
2015-01-09T11:17:00VictordeHollanderManual testing263264--0.412--
2015-01-09T11:17:00VictordeHollanderManual testing264265--0.784--
2015-07-15T23:43:00snme2pm1Manual testing265266--1.567--
2017-12-11T16:06:55YxinityManual testing266267--3.134--
2018-09-24T16:11:41YxinityManual testing267268--6.268--
2021-04-26T14:08:53TJAOIManual testing268269--12.54--
2021-08-17T05:34:47SRBaseManual testing269270--25.07--
2021-08-22T16:34:45SRBaseManual testing270271--50.15--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.781 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.781 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.781


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-06-07T00:00:00ANONYMOUSv4_computers809217AFCB40CA190.628
2000-04-12T00:00:00ANONYMOUSv4_computers809217AFCB40CA190.628


PRP results:
No PRP results for M4768607


P-1 factor-bounds graph:
B1 = 165000, B2 = 4166250 (P-1 stage 2)
B1 = 165000 (P-1 stage 1)
B1 = 30000, B2 = 412500 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-08-22T16:34:45+00:00