is 2 6937349 - 1
has 2088351 decimal digits
takes 1.513 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB7C0DCF0AF468A45double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272137.852968.0556 %35000009616446840166.703011.2967 %304.555971.6642 %
Target2674.283265.6716 %4500045000000.09102.2372 %4.374266.4396 %
Difference+5+133.5697+2.3839 %+3455000+9611946840+166.6120+9.0595%+300.1817+5.2246 %

Known prime factors:
No known factors for M6937349

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-09-10ANONYMOUSv4_computers35000472500--0.0191.779%
2012-08-18NesowaEPC8500015087506--0.0512.886%
2019-04-30takahashivaio30000050000006--0.1764.529%
2021-06-02Dylan DelgadoManual testing6300001890000012--0.4786.339%
2023-07-27takahashivaio250000057175650--1.7328.539%
2023-08-15ThaZ-17035000009616446840--199.615.795%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-09-27S00030v4_computers212610.022
1998-11-07jburkelv4_computers212620.044
2004-03-16Sturle Sundev4_computers212630.142
2014-02-09NesowaManual testing2632640.283
2014-02-16lycornManual testing2642650.539
2015-06-26VictordeHollanderManual testing2652661.077
2016-04-05Gordon SpenceManual testing2662672.154
2018-02-27ANONYMOUSManual testing2672684.309
2020-04-24TJAOIManual testing2682698.617
2021-07-25takahashiManual testing26927017.23
2021-08-12SRBaseManual testing27027134.47
2021-09-25SRBaseManual testing27127268.94


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)
1999-03-15ANONYMOUSv4_computers3205BA356F8A6A381.513
1999-05-30ANONYMOUSv4_computersB7C0DCF0AF468A451.513
2001-09-16ANONYMOUSv4_computersB7C0DCF0AF468A451.513


PRP results:
No PRP results for M6937349


CERT results:
No CERT results for M6937349


P-1 factor-bounds graph:
B1 = 3500000, B2 = 9616446840 (P-1 stage 2)
B1 = 2500000, B2 = 57175650 (P-1 stage 2)
B1 = 3500000 (P-1 stage 1)
B1 = 2500000 (P-1 stage 1)
B1 = 630000, B2 = 18900000 (P-1 stage 2)
B1 = 630000 (P-1 stage 1)
B1 = 300000, B2 = 5000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 85000, B2 = 1508750 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
B1 = 35000, B2 = 472500 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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1010
TF factor-bounds graph:
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266
265
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263
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261
this exponent TF target: 67
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
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Last modified: 2024-03-13T02:15:48+00:00