Constraints of 256 bit prime number?

SystemVerilog
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1

Hi,can anyone help me in writing constarints for getting a 256 bit random prime number

2

In reply to arjun@24:

I don’t think the systemverilog constraint can solve big number like that.

3

In reply to arjun@24:

There is no single equation to test for a prime number. So you can’t do with random constraints for such a large number range.