base-2 : 111 = 7(base-10)
base-3: 222 = 26(base-10)
base-4: 333 = 33(base-10)
base-5: 444 = 124(base-10)
base-6: 555 = 215(base-10)
base-7: 666 = 342(base-10)
base-8: 777 = 511(base-10)
base-9: 888 = 728(base-10)
base-10: 999 = 999(base-10)
base-11: AAA = 1241(base-10)
base-12: BBB = 1727(base-10)
base-13: CCC = 2196(base-10)
base-14: DDD = 2743(base-10)
base-15: EEE = 3374(base-10)
base-16: FFF = 4095(base-10)
In short, base-n: n cubed - 1(base-10)
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The largest 3-digit number in base 3 is 222. Its decimal equivalent is 26
997 is the highest number.It is 997.
961
The largest five-digit multiple of three is 99,999
9797 is the largest two digit prime number.