Nine independent visual engines
Largest Prime Number Calculators
Find finite largest primes, explore the current record, calculate digit-constrained results, examine Mersenne candidates and convert record length into understandable size.
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Largest Mersenne Prime Number CalculatorCalculate Mersenne-number digits from exponent p, check exponent eligibility, run Lucas–Lehmer for manageable exponents and compare with the record M136279841.Largest N-Digit Prime Number CalculatorChoose a digit length and find the greatest prime with exactly that many decimal digits, with exact bounds, candidate testing and visual digit analysis.Largest Prime Number Less Than N CalculatorEnter any whole-number limit and find the greatest prime below it, with candidate checks, prime gap, deterministic status and a live number-line visual.Largest Prime Number Discovery CalculatorExplore record prime discoveries from 1996 through M136279841, calculate digit growth, compare records and understand how the largest known prime was found.Largest Prime Number in Range CalculatorFind the greatest prime between two endpoints, count exact primes in manageable ranges, inspect distribution and verify endpoint handling.Largest Prime Number Less Than 100 CalculatorSee why 97 is the largest prime below 100 with an interactive 1–100 sieve, divisibility checks, prime list and greatest-prime visual.Largest Prime Number Less Than 1000 CalculatorVerify that 997 is the largest prime below 1000 using an exact sieve, hundred-block distribution, nearby candidates and divisibility proof.Largest Prime Number Size CalculatorConvert a giant prime digit count into pages, books, storage, printing time and shelf length, with the current 41,024,320-digit record preloaded.Largest Prime Number CalculatorExplore the largest known prime number, compare Mersenne exponents, calculate decimal digits and understand why no final largest prime exists.
Existing canonical calculator retained
Largest-prime-factor searches belong to the already published Prime Factorization Calculator and are not duplicated in this plugin.
Open Prime Factorization Calculator