Unverified50% confidenceFactExact time
JavaScript's native number type is an IEEE 754 double-precision float whose 53-bit mantissa loses precision when representing nanosecond-level timestamps (on the order of approximately 1.7×10¹⁸), which is the fundamental reason for recommending BigInt instead.
1
Sources
50%
Confidence
Long-term
Relevance
10/11/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedPython的浮点数遵循IEEE 754双精度浮点数标准，使用64位二进制来表示一个小数67% similarUnverifiedIEEE 754 双精度浮点数的指数偏移量为1023，实际指数范围为-1022到+102364% similarUnverifiedWhen dividing by 7, the magic constant M=0x2492492492492493 (64-bit) can be used to obtain the exact quotient via high-part multiplication and right shift.60% similarUnverifiedDouble-precision floating-point (double, 64-bit) can precisely represent integers within the range of ±2^53, but still cannot cover the full range of 64-bit integer division.60% similarUnverifiedThe machine precision of double-precision floating-point numbers is approximately 2.22 × 10^-16.59% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/999365API
curl https://kongchang.com/api/v1/knowledge/claims/999365MCP
get_claim(id=999365)