is 2 6959233 - 1
has 2094938 decimal digits
takes 1.517 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LCC8703B1A01B736Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272137.419468.0556%1000000300000000.81574.5621%138.235169.5129%
Target2674.269765.6716%4500072000000.13752.2384%4.407266.4400%
Difference+5+133.1497+2.3839%+955000+22800000+0.6783+2.3238%+133.8280+3.0729%

Known prime factors:
No known factors for M6959233

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-06-25Roman MaznichenkoWorkShop850001615000---0.053--1.594%
2019-05-12takahashivaio30000050000006---0.176--2.684%
2021-06-22takahashivaio10000003000000012---0.816--4.562%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-05-23ANONYMOUSv4_computers249250--1.07764e-5--
1999-05-30ANONYMOUSv4_computers249250--1.07764e-5--
1999-06-06ANONYMOUSv4_computers249250--1.07764e-5--
1999-05-23ANONYMOUSv4_computers250253--0.000--
1999-05-30ANONYMOUSv4_computers250253--0.000--
1999-06-06ANONYMOUSv4_computers250253--0.000--
1999-05-23ANONYMOUSv4_computers252255--0.001--
1999-05-30ANONYMOUSv4_computers252255--0.001--
1999-06-06ANONYMOUSv4_computers252255--0.001--
1998-07-05ANONYMOUSv4_computers21261--0.044--
1998-07-21ANONYMOUSv4_computers21262--0.088--
1999-05-23ANONYMOUSv4_computers261263--0.185--
1999-05-30ANONYMOUSv4_computers261263--0.185--
1999-06-06ANONYMOUSv4_computers261263--0.185--
2014-02-09NesowaManual testing263264--0.282--
2014-02-16lycornManual testing264265--0.537--
2015-06-26VictordeHollanderManual testing265266--1.074--
2016-04-06Gordon SpenceManual testing266267--2.148--
2018-02-25-Anonymous-Manual testing267268--4.295--
2020-04-24TJAOIManual testing268269--8.590--
2021-08-01takahashiManual testing269270--17.18--
2021-08-11SRBaseManual testing270271--34.36--
2021-09-26SRBaseManual testing271272--68.72--


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)
2000-05-05ANONYMOUSv4_computersCC8703B1A01B736E1.517
2001-10-25ANONYMOUSv4_computersCC8703B1A01B736E1.517


PRP results:
No PRP results for M6959233


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 300000, B2 = 5000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 85000, B2 = 1615000 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
261
255
253
250
this exponent TF target: 67
TF double-checked to: 67.8
ECM T-Level=1.15 ~= -13-bit
250
260
270
280
Last modified: 2023-06-05T21:50:05+00:00