is 2 615019 - 1
has 185140 decimal digits
takes 0.009 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L7B401D572876F716double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual269194.118971.0145%53000000826050675450992.663219.8298%1,186.782176.7623%
Target2440.000054.5455%100003600000.000615.4737%0.000661.5790%
Difference+25+194.1189+16.4690%+52990000+826050315450+992.6625+4.3561%+1,186.7814+15.1833%

Known prime factors (1 factor, 83.0 bits, 0.01349399% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
61501996087669429028291284958332582.9917811764305576599364
22 × 3 × 2689 × 6283213 × 38529671
2022-09-156283213385296712,759,0930.17710.2817

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-01-02ANONYMOUSv4_computers2000200000---0.000--0.121%
2002-01-22ANONYMOUSv4_computers4096409600---0.001--0.276%
2002-03-10ANONYMOUSv4_computers8192819200---0.001--0.525%
2002-05-05ANONYMOUSv4_computers163841638400---0.002--0.890%
2002-06-29ANONYMOUSv4_computers327683276800---0.005--1.384%
2002-09-29ANONYMOUSv4_computers655366553600---0.009--2.009%
2003-05-11ANONYMOUSv4_computers13107213107200---0.018--2.760%
2011-07-10Jocelyn LaroucheManual testing374376374376---0.008--1.155%
2011-08-31Jocelyn LaroucheManual testing623960623960---0.014--1.473%
2012-03-10Jocelyn LaroucheManual testing779950779950---0.017--1.627%
2012-08-01Jocelyn LaroucheManual testing12300381230038---0.027--1.969%
2013-10-19David Campeaui5-2500k127000040640000---0.075--4.941%
2015-10-22Bruno Victal5820K-linux16000006600000012---0.113--5.515%
2015-11-06Sid & AndyWoody615019018450570012---0.350--7.354%
2022-09-15masserManual testing530000008260506754502582.9911.1680.0192.33519.830%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-25masserManual testing530000023320000027--0.437


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-04-15ANONYMOUSv4_computers21256--0.016--
2001-10-20ANONYMOUSv4_computers21257--0.031--
2003-11-08ANONYMOUSv4_computers21258--0.062--
2008-10-13Sturle Sundeantonov.ifi258259--0.062--
2008-10-13Sturle Sundeantonov.ifi259260--0.125--
2010-08-14Architects Cubedm1_fw260261--0.250--
2015-07-19NRManual testing261262--0.499--
2015-10-01Gordon SpenceManual testing262263--1.596--
2015-10-02Gordon SpenceManual testing263264--3.192--
2017-06-19Smok_bmvManual testing264265--6.075--
2017-07-10Smok_bmvManual testing265266--12.15--
2018-10-08Smok_bmvManual testing266267--24.30--
2018-10-08Smok_bmvManual testing267268--48.60--
2018-10-08Smok_bmvManual testing268269--97.20--


ECM factoring results:
Total ECM effort:21.755 GHz-days
Estimated T-Level:26.843
DigitsB1CompleteFacMiss
201100027.6440.000%
25500003.7012.469%
302500000.36969.175%
3510000000.02997.123%
4030000000.00299.809%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002434.125
2500002500000017915.19
2500003675000070.691
2500003875000070.708
25000012899251051.040


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-04-11MadPooManual testing7B401D572876F7160.009


PRP results:
dateuseridcompidcofactorsres64PRP
2022-09-15masserManual testing
9608766942902829128495833
78C07DEAE92A9CBDno
2022-09-15LordJuliusWhiteBox
9608766942902829128495833
78C07DEAE92A9CBDno


P-1 factor-bounds graph:
B1 = 53000000, B2 = 826050675450 (P-1 stage 2)
B1 = 53000000 (P-1 stage 1)
B1 = 6150190, B2 = 184505700 (P-1 stage 2)
B1 = 6150190 (P-1 stage 1)
B1 = 1600000, B2 = 66000000 (P-1 stage 2)
B1 = 1270000, B2 = 40640000 (P-1 stage 2)
B1 = 1600000 (P-1 stage 1)
B1 = 1270000 (P-1 stage 1)
B1 = 1230038 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 779950 (P-1 stage 1)
B1 = 623960 (P-1 stage 1)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 374376 (P-1 stage 1)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 16384, B2 = 1638400 (P-1 stage 2)
B1 = 65536 (P-1 stage 1)
B1 = 8192, B2 = 819200 (P-1 stage 2)
B1 = 32768 (P-1 stage 1)
B1 = 4096, B2 = 409600 (P-1 stage 2)
B1 = 16384 (P-1 stage 1)
B1 = 2000, B2 = 200000 (P-1 stage 2)
B1 = 8192 (P-1 stage 1)
B1 = 4096 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
102
103
104
105
106
107
108
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
269
268
267
266
265
264
263
262
261
260
259
258
257
256
250
260
270
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290
2100
Last modified: 2022-09-15T08:12:54+00:00