Top Mersenne exponents with the most known factors:
Exponent range: - , number of factors between and

Known
Factors
Exponent
Count
113
106
945
8306
72,357
616,615
5132,350
Exponent # Known FactorsSum Bitsize of Known Factors Largest factor (bits) % Known PrimeNetGPU72actual
M3,250,525,1219444.8075.890.0000136841%287 291
M3,278,329,2119489.5475.160.0000149327%287 291
M3,356,318,9399445.7179.660.0000132799%287 291
M4,057,374,6919416.4660.430.0000102644%288 292

M4318431.00230.07100.0000000000%240 244
M7018701.00462.90100.0000000000%240 244
M1,00981,009.00382.66100.0000000000%240 244
M1,08781,087.00433.76100.0000000000%240 244
M2,6578384.49136.0514.4707100428%240 244
M3,7678423.82151.5611.2507356681%240 244
M3,7798311.5570.828.2442047111%240 244
M4,9338337.4878.256.8412140283%240 244
M5,9038371.26100.366.2892602075%240 244
M9,6018375.5590.783.9115727086%240 244
M20,4798455.78113.222.2255941626%240 244
M55,3438364.1580.240.6579873904%240 244
M110,5438384.9289.290.3482070330%240 244
M125,4298270.1678.620.2153851559%240 244
M128,8318409.0884.950.3175303507%240 244
M136,7338395.5096.500.2892486400%240 244
M177,0118424.9091.960.2400401772%240 244
M194,6538368.1777.180.1891392579%240 244
M209,5638350.7992.460.1673932582%240 244
M229,7118459.11107.550.1998640406%240 244
M421,6998399.0278.240.0946223341%240 244
M435,6798425.2476.820.0976049849%240 244
M444,7138359.4381.330.0808234844%240 244
M473,2198457.8277.730.0967458072%240 244
M651,7318345.2857.780.0529784864%240 244
M885,8038394.9582.310.0445865590%240 244
M1,156,8078426.5583.700.0368734801%256 260
M1,313,3638324.7069.420.0247228904%256 260
M1,330,2238374.6979.060.0281671399%256 260
M1,557,6238408.9774.760.0262560934%257 261
M2,171,1598302.7356.590.0139432487%258 262
M2,329,0818308.4174.590.0132416266%258 262
M2,346,1918333.2670.350.0142041116%258 262
M2,761,5678386.0778.000.0139800506%259 263
M3,206,4298409.8670.720.0127824325%260 264
M3,544,7418367.9498.400.0103798674%260 264
M3,658,2838357.0475.430.0097598940%260 264
M5,049,9598294.9952.510.0058415276%261 265
M5,491,3038416.3784.540.0075823653%262 266
M5,837,7198346.3283.430.0059323918%262 266
M7,788,2598331.4158.650.0042552815%263 267
M9,194,6598342.3757.490.0037236192%264 268
M9,532,3318320.3762.030.0033608319%264 268
M9,971,1478332.2362.450.0033318706%264 268
M10,172,7178364.1562.910.0035796576%264 268
M10,397,5378403.4380.890.0038800866%264 268
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