47.0M - 47.5M to 2^61
 

I'll be starting this range shortly.

Update: Week 1: 39 factors found; 2155 exponents processed.

Update: Week 2: 69 factors found; 4396 exponents processed.

Update: Week 3: 98 factors found; 6571 exponents processed.

Update: Week 4: 131 factors found; 8783 exponents processed.

Update: Week 5.7: Done. 197 factors found; 12536 exponents processed.

One exponent had two factors:
[CODE]M47184649 has a factor: 2232078807450140647
M47184649 has a factor: 1337693985434944513[/CODE]

[QUOTE]12536 exponents processed.[/QUOTE]
That should be 12531.