How to compute number with 256 bits?

[LeoLi0018]

How can I calculate the length of a 256-bit number?

I tried to change the parameter 't', but it seems that the maximum value I can set is 60.

[ShokofehVS]

I searched briefly among the closed issues. Maybe this SEAL manual would help you get to know better the scheme parameters.
Further on, there was a comment here explaining that "The HE security standard does not have parameters for degree 256. By default, it will be treated as insecure".
I was also wondering in this issue, how t can be set higher than what you mentioned.

[LeoLi0018]

Thanks for your answer.
Now I see, the SEAL lib constrains the individual primes can be up to 60 bits.

[ShokofehVS]

Hmm, as I didn't work with BFV scheme for a while. Does that mean you get a running execution or still you have problem?

[LeoLi0018]

Since SEAL has some constrains on the parameter setting, the problem still here. So, I need to figure out a workaround solution of my problem.

[ibarrond]

Could you describe the operation you seek to perform a bit more in detail? There might be some tricks with CRT decomposition that you might use