is 2 6924223 - 1
has 2084399 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-L013117DC5E6DB48Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272138.114268.0556%40000004143239108.33317.9718%146.447370.6021%
Target2674.291365.6716%4500072000000.13752.2365%4.428866.4394%
Difference+5+133.8229+2.3839%+3955000+407123910+8.1956+5.7353%+142.0186+4.1627%

Known prime factors:
No known factors for M6924223

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-08-31Chris Snyderv4_computers2500087500---0.009--0.431%
2011-09-03Carsten Kossendeymother44000013310000---0.361--3.505%
2021-06-02Dylan DelgadoManual testing6300001890000012---0.514--3.947%
2021-11-27Seth_TrManual testing400000011000000012---3.091--6.531%
2021-12-02Seth_TrManual testing4000000414323910---8.333--7.972%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05ANONYMOUSv4_computers21262--0.089--
1998-07-11ANONYMOUSv4_computers21262--0.089--
1998-07-21ANONYMOUSv4_computers21262--0.089--
1998-08-02ANONYMOUSv4_computers21262--0.089--
1998-08-09ANONYMOUSv4_computers21262--0.089--
2005-02-12ANONYMOUSv4_computers21263--0.230--
2014-02-09NesowaManual testing263264--0.284--
2014-02-17lycornManual testing264265--0.540--
2015-06-26VictordeHollanderManual testing265266--1.079--
2016-04-02Gordon SpenceManual testing266267--2.158--
2018-02-27-Anonymous-Manual testing267268--4.317--
2020-05-01TJAOIManual testing268269--8.634--
2021-07-19takahashiManual testing269270--17.27--
2021-08-10SRBaseManual testing270271--34.53--
2021-09-25SRBaseManual 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)
1999-03-26schazv4_computers013117DC5E6DB48D1.510
2002-01-15Chris Snyderv4_computers013117DC5E6DB48D1.510


PRP results:
No PRP results for M6924223


P-1 factor-bounds graph:
B1 = 4000000, B2 = 414323910 (P-1 stage 2)
B1 = 4000000, B2 = 110000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 630000, B2 = 18900000 (P-1 stage 2)
B1 = 440000, B2 = 13310000 (P-1 stage 2)
B1 = 630000 (P-1 stage 1)
B1 = 440000 (P-1 stage 1)
B1 = 25000, B2 = 87500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
this exponent TF target: 67
TF double-checked to: 67.8
ECM T-Level=1.15 ~= -13-bit
250
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270
280
Last modified: 2023-06-05T21:50:05+00:00