Prime p₀= 2146987024176776297 starts a Symmetric tuple of 20 consecutive primes (SPT).
d_n: 0 6 26 4 6 20 40 74 30 10 44 10 30 74 40 20 6 4 26 6 (?)
a_n: 0 6 32 36 42 62 102 176 206 216 260 270 300 374 414 434 440 444 470 476
All 20 integers p_n = p₀+a_n = p_n-1+d_n are prime and there are no other primes in the gaps.
diameter: 476
Found by: Landjunge
db: batch=80, k=20, 6 26 4 6 20 40 74 30 10 44

STPT(10)	2146985435118946151	0 2 36 38 78 80 120 122 156 158	-1589057830146
STPT(10)	2146985889859669667	0 2 54 56 72 74 90 92 144 146	-1134317106630
SPT(16)	2146985892887966749	0 22 24 40 58 82 108 120 142 154 180 204 222 238 240 262	-1131288809548
SPT(16)	2146985993979103217	0 6 14 62 72 92 114 132 134 152 174 194 204 252 260 266	-1030197673080
STPT(10)	2146986314351136857	0 2 30 32 42 44 54 56 84 86	-709825639440
STPT(10)	2146986588148632341	0 2 66 68 138 140 210 212 276 278	-436028143956
SPT(16)	2146987157664300493	0 6 58 64 94 106 124 136 138 150 168 180 210 216 268 274	133487524196
STPT(10)	2146987174477580717	0 2 42 44 72 74 102 104 144 146	150300804420
SPT(16)	2146987581524347171	0 18 36 100 106 120 126 136 162 172 178 192 198 262 280 298	557347570874
TPT(14)	2146987704582970661	0 2 96 98 156 158 348 350 396 398 438 440 450 452	680406194364
SPT(18)	2146987778859063859	0 28 54 60 64 82 118 120 124 258 262 264 300 318 322 328 354 382	754682287562