Kikagua nambari tasa
Angalia kama nambari ni tasa na uone vigawe na nambari tasa zilizo karibu.
Hufanya kazi kwenye kivinjari chako. Faili zako hazitoki kamwe kwenye kifaa. Tazama jinsi ya kuthibitisha
…
Jinsi ya kufanya
- 1Jaza visanduku
Andika namba zako au chagua chaguo unazohitaji.
- 2Angalia matokeo
Jibu husasishwa mara moja unapobadilisha thamani.
- 3Litumie
Nakili matokeo au yaandike. Hakuna kinachotumwa popote.
About this tool
Enter a whole number up to one trillion. You see whether it is prime, its prime factorisation if it is not, and the nearest prime numbers before and after it.
When to use it
Check if a number is prime and see its factors and nearby primes.
Tips
A prime has exactly two factors, one and itself.
Privacy
Everything runs in your browser, so your data is not uploaded or stored.
Handy facts
The first primes are 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29. Every number above 1 is either prime or a product of primes, which is why primes are called the building blocks of numbers.
Mfano uliotatuliwa
With the boxes at their starting values (Whole number: 97), the tool shows: Prime factors: 97; Previous prime: 89; Next prime: 101; Result: Prime number. Change any box to see your own numbers. The result updates as you type, and nothing leaves your browser.
Vidokezo vya matokeo bora
Angalia kila kisanduku kabla ya kuamini matokeo, kwa sababu nambari moja isiyo sahihi hubadilisha jibu zima. Tumia nambari kamili kutoka kwenye hati ya mshahara, ankara, cheti au mkataba na uandike tarehe uliyohesabu. Viwango, vizingiti na sheria hubadilika mara kwa mara, kwa hivyo kwa kodi, ada na masuala ya kisheria chukulia matokeo kuwa makadirio na uyathibitishe na chanzo rasmi kilichotajwa kwenye ukurasa huu. Unaweza kujaribu hali nyingi unavyotaka; hakuna kinachohifadhiwa wala kutumwa na kupakia upya ukurasa husafisha visanduku.
Kwa ufupi
- Kategoria: Zana za kila siku
- Hufanya kazi kwenye kivinjari, bila usajili, bila kupakia.
- Taarifa unazoingiza hubaki kwenye kifaa chako.
- Inapatikana kwa lugha nyingi.
- Maudhui yalikaguliwa mwisho:
Maswali yanayoulizwa mara kwa mara
What is a prime number?
A number greater than 1 that can only be divided by 1 and itself, such as 2, 3, 5, 7 and 11.
Is 1 a prime?
No. A prime has exactly two different divisors, and 1 has only one.
Is 1 prime?
No.
Is 2 prime?
Yes, it is the only even prime.
How can I test a number by hand?
Divide it by primes up to its square root. If none divide it, it is prime.