RFR: 8294593: Check the size of the target on invocations of BigInteger::isProbablePrime

[Raffaello Giulietti]

Throws an `ArithemticException` when the target is huge.

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Commit messages:
 - 8294593: Check the size of the target on invocations of BigInteger::isProbablePrime

Changes: https://git.openjdk.org/jdk/pull/10541/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10541&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294593
  Stats: 24 lines in 2 files changed: 21 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/10541.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10541/head:pull/10541

PR: https://git.openjdk.org/jdk/pull/10541