is 2 245627 - 1
has 73942 decimal digits
takes 0.001 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L5111F9D577C6503Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual267120.971773.1343 %30000000101202470268904,486.311423.3945 %4,607.283179.4194 %
Target2440.000059.0909 %45005500000.000310.1326 %0.000363.2361 %
Difference+23+120.9717+14.0434 %+29995500+10120246476890+4,486.3111+13.2619%+4,607.2828+16.1834 %

Known prime factors (1 factor, 68.1 bits, 0.02770686% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2456273067291527478464029272168.056624379959751669
11 × 1609 × 35277697031
2009-03-31160935277697031242.6615.63829.207

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-06-09ANONYMOUSv4_computers10000010000000--0.00524.887%
2002-06-02ANONYMOUSv4_computers32768327680012--0.00220.692%
2002-08-03ANONYMOUSv4_computers65536655360012--0.00323.312%
2003-03-07ANONYMOUSv4_computers1310721310720030--0.00725.886%
2003-11-08ANONYMOUSv4_computers2621442621440012--0.01428.408%
2021-07-30Oliver KruseOllaptop30000000300000000024--1.56143.983%
2022-04-13Oliver KruseThreadripper-PC3000000010120247026890
skipped known factor: 306729152747846402927
--5,57563.091%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-11-24ANONYMOUSv4_computers2522530.002
2000-04-19ANONYMOUSv4_computers212540.010
2022-03-07LordJuliusManual testing254255
2001-02-18ANONYMOUSv4_computers212560.039
2002-04-14ANONYMOUSv4_computers212570.078
2022-03-07LordJuliusManual testing257258
2008-12-31Sturle Sundeghini.ifi2582590.156
2009-01-04Sturle Sundetristan.ifi2592600.313


ECM factoring results:
Total ECM effort:13.837 GHz-days
Estimated T-Level:28.436
DigitsB1CompleteFacMiss
201100047.4240.000%
25500006.6340.132%
302500000.68750.301%
3510000000.05694.571%
4030000000.00499.630%


ECM Summary

B1B2factorcurvesGHz-days
10.005
5000050000002801.646
250000250000002477.379
25000032250000501.638
2500003300000070.231
25000036250000642.198
25000038500000210.740


Lucas-Lehmer results:
No L-L results for M245627


PRP results:
dateuseridcompidcofactorsres64
2017-09-22Oliver KruseOllaptop
306729152747846402927
24D7A83148D50497
2017-09-22Oliver KruseManual testing
306729152747846402927
24D7A83148D50497
2017-10-12Oliver KruseGTX-0
306729152747846402927
24D7A83148D50497
2017-11-06kkmrkkblmbrbkc4.xlarge
306729152747846402927
24D7A83148D50497
2020-04-17Oliver KruseAddPrpType5
306729152747846402927
D5139CF0E0F43932
2024-02-03Wentao HuangManual testing
306729152747846402927
D5139CF0E0F43932


CERT results:
dateuseridcompid
2024-02-03slaurnocebo


P-1 factor-bounds graph:
B1 = 30000000, B2 = 10120247026890 (P-1 stage 2)
B1 = 30000000, B2 = 3000000000 (P-1 stage 2)
B1 = 30000000 (P-1 stage 1)
B1 = 262144, B2 = 26214400 (P-1 stage 2)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 100000, B2 = 10000000 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 262144 (P-1 stage 1)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
102
103
104
105
106
107
108
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
TF factor-bounds graph:
260
259
258
257
256
255
254
253
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=28.44 ~= 78-bit
250
260
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Last modified: 2024-03-03T02:29:32+00:00