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Mathematica > Global Computation Settings & Parameters >

Built-in Mathematica Symbol

$MaxExtraPrecision

$MaxExtraPrecision
gives the maximum number of extra digits of precision to be used in functions such as N.

You can use Block[{$MaxExtraPrecision=n}, expr] to reset the value of $MaxExtraPrecision temporarily during the evaluation of expr.

$MaxExtraPrecision is used implicitly in various exact numerical computations, including equality tests, comparisons and functions such as Round and Sign.

Allow up to 1000 digits of extra precision to complete a numerical approximation:

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