Help in finding the bitsets?

I have a programming problem that I can't seem to work out and the zero(0)

bit is from left to right, instead right to left.

I need to see which bits are set with the following ...

I have 100 bits that I have to work with.

If I use the base 2, I would surely run out of decimals numbers to work

with.

1 2 4 8 16 32 64 128 256 512 1024 ---> etc ... numbers

gets out of range! before 100th bit.

bits 00 01 02 03 04 05 06 07 08 09 10 ---> 94 96 97 98 99

100

x x x

x x

Let say I have, the bits set showing as an X underneath of the bits.

Also, either way bit 0 could be far right or in this case above bit 0 is

start left.

How can this bit evaluation be done? An example would be great to show me.

Thanks so much.