N2x3x5x7x vs PrefixCalc

Is your telephone number prime ? Or your Birthday ?? N2x3x5x7x will show the prime factors for any number up to 10,000,000,000. It will also convert any number from/to any base 2 to 16. Use N2x3x5x7x, with its unique spiral keyboard, to explore the natural numbers and see if you can find primes, or perhaps a surreal pattern... N2x3x5x7x, an infinitesimal contribution to Number Theory

This calculator supports Metric‑prefix such as kilo and giga. The calculator supports quetta (10^30) and quecto (10^-30), which were added in 2022. Main Functions ・Support for arithmetic operations (+ - ×÷) ・Results converted to Japanese numerals for display ・Delete one character at a time with the "DEL" button 　Press and hold to delete all ・Press and hold to copy calculation formulas and results 　English (Short scale, Long scale) and 　Chinese numerals can also be selected. ・Calculations that include prefixes such as 2M+1k, 2M×1μ, etc. Note: ・Very large numbers that exceed 200 digits may be rounded off for display and calculation purposes. 　Please note this when precision is required. ・Short scale and Long scale are currently supported up to 10^198. ・Kanji notation is supported up to 10^72. 　If it is greater than the number, it will be displayed in Arabic numerals.