% /opt/v5.28.1/bin/perl -MMath::BigInt -we '$z0 = Math::BigInt->new(~0); for (1..4096) { $z1 = $z0 + $_; $n1 = "$z1"; die $_ if $n1 != ~0 }'
2985 at -e line 1.
% /opt/v5.30.0-d/bin/perl -MMath::BigInt -we '$z0 = Math::BigInt->new(~0); for (1..4096) { $z1 = $z0 + $_; $n1 = "$z1"; die $_ if $n1 != ~0 }'
2050 at -e line 1.
%