[re]

I believe this has improved in jq 1.7: https://github.com/jqlang/jq/releases/tag/jq-1.7

> Use decimal number literals to preserve precision. Comparison operations respects precision but arithmetic operations might truncate.

[anonymoushn]

This is still broken in jq 1.7 for sufficiently long exponents

[re]

From a quick test it looks like it supports exponents up to 9 digits long (i.e. 1.0e999999999), which, frankly, seems pretty reasonable; it's hard for me to imagine a use case where you'd want to represent numbers larger than that.