User TJAOI has done TF for all exponents in GIMPS range (<1G) up to 2^67
Mersenne numbers trial factoring (TF) effort gaps (missed bit levels):
61 exponents like this known
Exponent range: M to M
TF range: to
GHz-days effort: to Show TF assignments starting from 1 if B1 <=
(only for exponent >1M)

ExponentGapGHd
M818938764-673.4
M818950964-673.4
M818964166-672.7
M818976166-672.7
M818977362-673.6
M818977758-673.6
M818983765-673.2
M818995760-673.6
M818996362-673.6
M8190067671.8
M1282782179-8014,316.5
M3005579961-671.0
M3005594366-670.7
M3005719962-671.0
M3005834963-671.0
M3005998963-671.0
M30062899670.5
M3007730360-671.0
M30077543670.5
M3007756356-64,66-670.9
M3007770162-671.0
M3008050763-671.0
M3008218163-671.0
M3008339364-670.9
M3008401759-671.0
M3008448761-671.0
M3008516964-670.9
M30086839670.5
M3008705366-670.7
M3008905355-60,62-671.0
M3009239965-670.9
M3009886759-671.0
M3401529158-670.9
M3401801360-670.9
M3401993365-670.8
M3402002364-670.8
M3402002961-670.9
M3402080366-670.7
M3402491960-670.9
M3402626361-670.9
M34027099670.4
M3402751756-62,64-670.8
M3402867164-670.8
M3403033361-670.9
M3403347163-670.9
M3403438355-60,62-670.9
M3403489959-670.9
M3403625962-670.9
M3403745960-670.9
M3918312175-76292.9
M4861029175-77551.0
M7253326180-8211,815.7
M8213248777-802,795.0
M10891218779562.1
M110999011801,103.0
M16008054180764.8
M1600807078412,237.2
M58908501161-640.0
M93647902356-660.0
M99249315755-670.0
M99374143155-670.0
GHz-days total:44,502