Is 10 ** -342 minimum possible value for double range in scientific_ method?

[Max Graey]

It seems this should be -324 here

[Chen-Pang He]

It is because maximum significand is 2⁶⁴ − 1, so we need -342 to go small enough. significand is interpreted as a plain integer here.

Smallest representable positive double ≈ 5e-324
(2⁶⁴ − 1) 10^-342 ≈ 2e-323

[Max Graey]

Got it! thanks