Prime p₀= 1997221045771723349 starts a Symmetric tuple of 13 consecutive primes (SPT).
d_n: 0 18 30 6 30 54 36 36 54 30 6 30 18 (?)
a_n: 0 18 48 54 84 138 174 210 264 294 300 330 348
All 13 integers p_n = p₀+a_n = p_n-1+d_n are prime and there are no other primes in the gaps.
diameter: 348
Found by: Chooka
db: batch=80, k=13, 18 30 6 30 54 36

STPT(10)	1997220195714986087	0 2 24 26 42 44 60 62 84 86	-850056737262
TPT(14)	1997220256009756577	0 2 72 74 114 116 132 134 174 176 204 206 354 356	-789761966772
STPT(10)	1997220438115522691	0 2 30 32 78 80 126 128 156 158	-607656200658
SPT(16)	1997220453835775603	0 8 128 134 140 164 180 194 210 224 240 264 270 276 396 404	-591935947746
STPT(10)	1997220671058349871	0 2 36 38 78 80 120 122 156 158	-374713373478
SPT(16)	1997220997633597733	0 8 18 54 56 78 110 144 170 204 236 258 260 296 306 314	-48138125616
STPT(10)	1997221064930223227	0 2 30 32 42 44 54 56 84 86	19158499878
SPT(16)	1997221076740126969	0 28 30 34 42 58 64 78 124 138 144 160 168 172 174 202	30968403620
SPT(16)	1997221125270987983	0 8 26 38 54 66 68 78 86 96 98 110 126 138 156 164	79499264634
SPT(16)	1997221204377795523	0 10 18 40 130 150 156 186 388 418 424 444 534 556 564 574	158606072174
STPT(10)	1997221339389361991	0 2 6 8 48 50 90 92 96 98	293617638642