Prime p₀= 1640031094322350339 starts a Symmetric tuple of 20 consecutive primes (SPT).
d_n: 0 10 74 18 60 6 30 16 6 20 22 20 6 16 30 6 60 18 74 10 (?)
a_n: 0 10 84 102 162 168 198 214 220 240 262 282 288 304 334 340 400 418 492 502
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: 502
Found by: vinn@[CNT]
db: batch=78, k=20, 10 74 18 60 6 30 16 6 20 22

SPT(16)	1640030351059386971	0 6 12 18 32 102 116 122 126 132 146 216 230 236 242 248	-743262963368
TPT(14)	1640030466380881877	0 2 30 32 84 86 120 122 162 164 282 284 414 416	-627941468462
SPT(16)	1640030601702255743	0 18 26 38 56 74 144 168 236 260 330 348 366 378 386 404	-492620094596
TPT(14)	1640030653346211281	0 2 126 128 138 140 180 182 210 212 240 242 276 278	-440976139058
STPT(10)	1640030825785922747	0 2 60 62 72 74 84 86 144 146	-268536427592
STPT(10)	1640030964265735157	0 2 30 32 42 44 54 56 84 86	-130056615182
SPT(16)	1640031543172338439	0 22 34 40 54 100 112 160 162 210 222 268 282 288 300 322	448849988100
STPT(10)	1640031791075376701	0 2 30 32 60 62 90 92 120 122	696753026362
TPT(14)	1640031854463308819	0 2 30 32 78 80 102 104 132 134 162 164 168 170	760140958480
STPT(10)	1640031947319846917	0 2 42 44 72 74 102 104 144 146	852997496578
SPT(16)	1640032003060040333	0 60 90 98 146 228 258 266 300 308 338 420 468 476 506 566	908737689994