is 2 6924409 - 1
has 2084455 decimal digits
takes 1.510 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5B8C734393EF165Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272138.110568.0556%40000004567054809.06328.0784%147.173770.6361%2.5806%
PrimeNet2630.230563.4921%280007000000.02043.1604%0.250964.6458%1.1538%
GPU722674.291265.6716%450009000000.02902.2365%4.320166.4394%0.7678%
Difference+5+133.8193+2.3839%+3955000+455805480+9.0342+5.8418%+142.8536+4.1967%+1.8128%

Known prime factors:
No known factors for M6924409

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-08-31T00:00:00ANONYMOUSv4_computers2500087500---0.009--0.431%
2002-04-07T00:00:00ANONYMOUSv4_computers3000030000---0.009--0.234%
2011-09-03T20:12:00Carsten Kossendeymother44000013420000---0.363--3.511%
2021-06-02T21:12:50Dylan DelgadoManual testing6300001890000012---0.514--3.947%
2021-11-29T13:29:50Seth_TrManual testing4000000456705480---9.063--8.078%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-11T00:00:00ANONYMOUSv4_computers21262--0.089--
1999-05-09T00:00:00ANONYMOUSv4_computers21262--0.089--
1999-07-12T00:00:00ANONYMOUSv4_computers21262--0.089--
2005-02-18T00:00:00ANONYMOUSv4_computers21263--0.230--
2014-02-09T10:09:00NesowaManual testing263264--0.284--
2014-02-17T08:57:00lycornManual testing264265--0.540--
2015-06-26T13:39:00VictordeHollanderManual testing265266--1.079--
2016-04-02T19:16:02Gordon SpenceManual testing266267--2.158--
2018-02-27T00:21:36-Anonymous-Manual testing267268--4.317--
2020-05-01T08:51:07TJAOIManual testing268269--8.634--
2021-07-19T22:38:30takahashiManual testing269270--17.27--
2021-08-11T16:26:26SRBaseManual testing270271--34.53--
2021-09-28T15:12:13SRBaseManual testing271272--69.07--


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00Joel Armengaudv4_computers5B8C734393EF165F1.510
2002-05-25T00:00:00ANONYMOUSv4_computers5B8C734393EF165F1.510


PRP results:
No PRP results for M6924409


P-1 factor-bounds graph:
B1 = 4000000, B2 = 456705480 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 630000, B2 = 18900000 (P-1 stage 2)
B1 = 440000, B2 = 13420000 (P-1 stage 2)
B1 = 630000 (P-1 stage 1)
B1 = 440000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
B1 = 25000, B2 = 87500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-11-29T13:29:50+00:00