is 2 2897789 - 1
has 872322 decimal digits
takes 0.224 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26710.254067.1642 %3200002434370401.51937.7217 %11.773269.6997 %
Target2630.550865.0794 %1600015000000.01081.9087 %0.561665.7459 %
Difference+4+9.7032+2.0848 %+304000+241937040+1.5084+5.8130%+11.2116+3.9538 %

Known prime factors (3 factors, 207.6 bits, 0.00716310% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2897789113611930982618171753.3351960320972
22 × 3 × 192 × 452521
-3614525210.00040.00280.0052
289778994491621804217963211963.0351630408939440
24 × 3 × 5 × 6793370581
2016-11-301667933705810.550841.45177.419
289778928473850094887162530081138732891.202491303026115551590024
23 × 3 × 7 × 16139 × 307523 × 589231469
2018-05-26307523589231469173,058,5213.62786.7150

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-12-05USAFSS6917th_Scty_Sq320000243437040
skipped known factor: 11361193098261817
--1.77210.953%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2016-11-30TJAOIManual testing263264*63.035190.024


ECM factoring results:
Total ECM effort:0.419 GHz-days
Estimated T-Level:0.769
DigitsB1CompleteFacMiss
20110000.15485.740%
25500000.01498.587%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.314
50000500000010.105


Lucas-Lehmer results:
No L-L results for M2897789


PRP results:
dateuseridcompidcofactorsres64
2017-10-24Oliver KruseGTX-2
11361193098261817
9449162180421796321
17627E0934E67376
2017-12-08kkmrkkblmbrbkc4.xlarge
11361193098261817
9449162180421796321
17627E0934E67376
2018-05-28ANONYMOUSdory
11361193098261817
9449162180421796321
2847385009488716253008113873
17627E0934E67376
2018-05-28NetaniasWin10
11361193098261817
9449162180421796321
2847385009488716253008113873
17627E0934E67376


CERT results:
No CERT results for M2897789


P-1 factor-bounds graph:
B1 = 320000, B2 = 243437040 (P-1 stage 2)
B1 = 320000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=0.77 ~= -14-bit
250
260
270
280
290
2100
JSON version of this page
Last modified: 2024-02-09T03:30:02+00:00