89 does not have a twin prime.
The first 100 twins:
1: (3,5) 2: (5,7) 3: (11,13) 4: (17,19)
5: (29,31) 6: (41,43) 7: (59,61) 8: (71,73)
9: (101,103) 10: (107,109) 11: (137,139) 12: (149,151)
13: (179,181) 14: (191,193) 15: (197,199) 16: (227,229)
17: (239,241) 18: (269,271) 19: (281,283) 20: (311,313)
21: (347,349) 22: (419,421) 23: (431,433) 24: (461,463)
25: (521,523) 26: (569,571) 27: (599,601) 28: (617,619)
29: (641,643) 30: (659,661) 31: (809,811) 32: (821,823)
33: (827,829) 34: (857,859) 35: (881,883) 36: (1019,1021)
37: (1031,1033) 38: (1049,1051) 39: (1061,1063) 40: (1091,1093)
41: (1151,1153) 42: (1229,1231) 43: (1277,1279) 44: (1289,1291)
45: (1301,1303) 46: (1319,1321) 47: (1427,1429) 48: (1451,1453)
49: (1481,1483) 50: (1487,1489) 51: (1607,1609) 52: (1619,1621)
53: (1667,1669) 54: (1697,1699) 55: (1721,1723) 56: (1787,1789)
57: (1871,1873) 58: (1877,1879) 59: (1931,1933) 60: (1949,1951)
61: (1997,1999) 62: (2027,2029) 63: (2081,2083) 64: (2087,2089)
65: (2111,2113) 66: (2129,2131) 67: (2141,2143) 68: (2237,2239)
69: (2267,2269) 70: (2309,2311) 71: (2339,2341) 72: (2381,2383)
73: (2549,2551) 74: (2591,2593) 75: (2657,2659) 76: (2687,2689)
77: (2711,2713) 78: (2729,2731) 79: (2789,2791) 80: (2801,2803)
81: (2969,2971) 82: (2999,3001) 83: (3119,3121) 84: (3167,3169)
85: (3251,3253) 86: (3257,3259) 87: (3299,3301) 88: (3329,3331)
89: (3359,3361) 90: (3371,3373) 91: (3389,3391) 92: (3461,3463)
93: (3467,3469) 94: (3527,3529) 95: (3539,3541) 96: (3557,3559)
97: (3581,3583) 98: (3671,3673) 99: (3767,3769) 100: (3821,3823)
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Prime numbers between 80 and a 100 are: 83, 89 and 97
89 is a prime number.
The twin prime of 191 is 193.
The last known twin prime number as of now is 2996863034895, which is part of the twin prime pair (2996863034895, 2996863034897). Twin prime numbers are prime numbers that differ by 2. However, it is worth noting that there may be larger twin prime numbers that have not been discovered yet.
89 has two factors: 1 and 89. It is a prime number.